topology.algebra.order.extend_from ⟷ Mathlib.Topology.Algebra.Order.ExtendFrom

mathlib commit https://github.com/leanprover-community/mathlib/commit/65a1391a0106c9204fe45bc73a039f056558cb83

@@ -87,7 +87,7 @@ theorem continuousOn_Ioc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     ContinuousOn (extendFrom (Ioo a b) f) (Ioc a b) :=
   by
   have := @continuousOn_Ico_extendFrom_Ioo αᵒᵈ _ _ _ _ _ _ _ f _ _ _ hab
-  erw [dual_Ico, dual_Ioi, dual_Ioo] at this 
+  erw [dual_Ico, dual_Ioi, dual_Ioo] at this
   exact this hf hb
 #align continuous_on_Ioc_extend_from_Ioo continuousOn_Ioc_extendFrom_Ioo
 -/

mathlib commit https://github.com/leanprover-community/mathlib/commit/ce64cd319bb6b3e82f31c2d38e79080d377be451

@@ -3,8 +3,8 @@ Copyright (c) 2017 Johannes Hölzl. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov
 -/
-import Mathbin.Topology.Order.Basic
-import Mathbin.Topology.ExtendFrom
+import Topology.Order.Basic
+import Topology.ExtendFrom
 
 #align_import topology.algebra.order.extend_from from "leanprover-community/mathlib"@"3e32bc908f617039c74c06ea9a897e30c30803c2"
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/8ea5598db6caeddde6cb734aa179cc2408dbd345

@@ -2,15 +2,12 @@
 Copyright (c) 2017 Johannes Hölzl. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov
-
-! This file was ported from Lean 3 source module topology.algebra.order.extend_from
-! leanprover-community/mathlib commit 3e32bc908f617039c74c06ea9a897e30c30803c2
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Topology.Order.Basic
 import Mathbin.Topology.ExtendFrom
 
+#align_import topology.algebra.order.extend_from from "leanprover-community/mathlib"@"3e32bc908f617039c74c06ea9a897e30c30803c2"
+
 /-!
 # Lemmas about `extend_from` in an order topology.
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/9fb8964792b4237dac6200193a0d533f1b3f7423

@@ -27,6 +27,7 @@ universe u v
 
 variable {α : Type u} {β : Type v}
 
+#print continuousOn_Icc_extendFrom_Ioo /-
 theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {la lb : β}
     (hab : a ≠ b) (hf : ContinuousOn f (Ioo a b)) (ha : Tendsto f (𝓝[>] a) (𝓝 la))
@@ -40,7 +41,9 @@ theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     · exact ⟨lb, hb.mono_left <| nhdsWithin_mono _ Ioo_subset_Iio_self⟩
     · use f x, hf x h
 #align continuous_on_Icc_extend_from_Ioo continuousOn_Icc_extendFrom_Ioo
+-/
 
+#print eq_lim_at_left_extendFrom_Ioo /-
 theorem eq_lim_at_left_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [T2Space β] {f : α → β} {a b : α} {la : β} (hab : a < b)
     (ha : Tendsto f (𝓝[>] a) (𝓝 la)) : extendFrom (Ioo a b) f a = la :=
@@ -50,7 +53,9 @@ theorem eq_lim_at_left_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [De
     simp only [le_of_lt hab, left_mem_Icc, right_mem_Icc]
   · simpa [hab]
 #align eq_lim_at_left_extend_from_Ioo eq_lim_at_left_extendFrom_Ioo
+-/
 
+#print eq_lim_at_right_extendFrom_Ioo /-
 theorem eq_lim_at_right_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [T2Space β] {f : α → β} {a b : α} {lb : β} (hab : a < b)
     (hb : Tendsto f (𝓝[<] b) (𝓝 lb)) : extendFrom (Ioo a b) f b = lb :=
@@ -60,7 +65,9 @@ theorem eq_lim_at_right_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [D
     simp only [le_of_lt hab, left_mem_Icc, right_mem_Icc]
   · simpa [hab]
 #align eq_lim_at_right_extend_from_Ioo eq_lim_at_right_extendFrom_Ioo
+-/
 
+#print continuousOn_Ico_extendFrom_Ioo /-
 theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {la : β}
     (hab : a < b) (hf : ContinuousOn f (Ioo a b)) (ha : Tendsto f (𝓝[>] a) (𝓝 la)) :
@@ -74,7 +81,9 @@ theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
       simpa [hab]
     · use f x, hf x h
 #align continuous_on_Ico_extend_from_Ioo continuousOn_Ico_extendFrom_Ioo
+-/
 
+#print continuousOn_Ioc_extendFrom_Ioo /-
 theorem continuousOn_Ioc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {lb : β}
     (hab : a < b) (hf : ContinuousOn f (Ioo a b)) (hb : Tendsto f (𝓝[<] b) (𝓝 lb)) :
@@ -84,4 +93,5 @@ theorem continuousOn_Ioc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
   erw [dual_Ico, dual_Ioi, dual_Ioo] at this 
   exact this hf hb
 #align continuous_on_Ioc_extend_from_Ioo continuousOn_Ioc_extendFrom_Ioo
+-/
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/cca40788df1b8755d5baf17ab2f27dacc2e17acb

@@ -81,7 +81,7 @@ theorem continuousOn_Ioc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     ContinuousOn (extendFrom (Ioo a b) f) (Ioc a b) :=
   by
   have := @continuousOn_Ico_extendFrom_Ioo αᵒᵈ _ _ _ _ _ _ _ f _ _ _ hab
-  erw [dual_Ico, dual_Ioi, dual_Ioo] at this
+  erw [dual_Ico, dual_Ioi, dual_Ioo] at this 
   exact this hf hb
 #align continuous_on_Ioc_extend_from_Ioo continuousOn_Ioc_extendFrom_Ioo
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

@@ -21,7 +21,7 @@ import Mathbin.Topology.ExtendFrom
 
 open Filter Set TopologicalSpace
 
-open Topology Classical
+open scoped Topology Classical
 
 universe u v
 

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

@@ -27,12 +27,6 @@ universe u v
 
 variable {α : Type u} {β : Type v}
 
-/- warning: continuous_on_Icc_extend_from_Ioo -> continuousOn_Icc_extendFrom_Ioo is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β} {lb : β}, (Ne.{succ u1} α a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Icc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
-but is expected to have type
-  forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β} {lb : β}, (Ne.{succ u2} α a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Icc.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
-Case conversion may be inaccurate. Consider using '#align continuous_on_Icc_extend_from_Ioo continuousOn_Icc_extendFrom_Iooₓ'. -/
 theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {la lb : β}
     (hab : a ≠ b) (hf : ContinuousOn f (Ioo a b)) (ha : Tendsto f (𝓝[>] a) (𝓝 la))
@@ -47,12 +41,6 @@ theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     · use f x, hf x h
 #align continuous_on_Icc_extend_from_Ioo continuousOn_Icc_extendFrom_Ioo
 
-/- warning: eq_lim_at_left_extend_from_Ioo -> eq_lim_at_left_extendFrom_Ioo is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f a) la)
-but is expected to have type
-  forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : T2Space.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (Eq.{succ u1} β (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f a) la)
-Case conversion may be inaccurate. Consider using '#align eq_lim_at_left_extend_from_Ioo eq_lim_at_left_extendFrom_Iooₓ'. -/
 theorem eq_lim_at_left_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [T2Space β] {f : α → β} {a b : α} {la : β} (hab : a < b)
     (ha : Tendsto f (𝓝[>] a) (𝓝 la)) : extendFrom (Ioo a b) f a = la :=
@@ -63,12 +51,6 @@ theorem eq_lim_at_left_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [De
   · simpa [hab]
 #align eq_lim_at_left_extend_from_Ioo eq_lim_at_left_extendFrom_Ioo
 
-/- warning: eq_lim_at_right_extend_from_Ioo -> eq_lim_at_right_extendFrom_Ioo is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f b) lb)
-but is expected to have type
-  forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : T2Space.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (Eq.{succ u1} β (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f b) lb)
-Case conversion may be inaccurate. Consider using '#align eq_lim_at_right_extend_from_Ioo eq_lim_at_right_extendFrom_Iooₓ'. -/
 theorem eq_lim_at_right_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [T2Space β] {f : α → β} {a b : α} {lb : β} (hab : a < b)
     (hb : Tendsto f (𝓝[<] b) (𝓝 lb)) : extendFrom (Ioo a b) f b = lb :=
@@ -79,12 +61,6 @@ theorem eq_lim_at_right_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [D
   · simpa [hab]
 #align eq_lim_at_right_extend_from_Ioo eq_lim_at_right_extendFrom_Ioo
 
-/- warning: continuous_on_Ico_extend_from_Ioo -> continuousOn_Ico_extendFrom_Ioo is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ico.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
-but is expected to have type
-  forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Ico.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
-Case conversion may be inaccurate. Consider using '#align continuous_on_Ico_extend_from_Ioo continuousOn_Ico_extendFrom_Iooₓ'. -/
 theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {la : β}
     (hab : a < b) (hf : ContinuousOn f (Ioo a b)) (ha : Tendsto f (𝓝[>] a) (𝓝 la)) :
@@ -99,12 +75,6 @@ theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     · use f x, hf x h
 #align continuous_on_Ico_extend_from_Ioo continuousOn_Ico_extendFrom_Ioo
 
-/- warning: continuous_on_Ioc_extend_from_Ioo -> continuousOn_Ioc_extendFrom_Ioo is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ioc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
-but is expected to have type
-  forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Ioc.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
-Case conversion may be inaccurate. Consider using '#align continuous_on_Ioc_extend_from_Ioo continuousOn_Ioc_extendFrom_Iooₓ'. -/
 theorem continuousOn_Ioc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {lb : β}
     (hab : a < b) (hf : ContinuousOn f (Ioo a b)) (hb : Tendsto f (𝓝[<] b) (𝓝 lb)) :

mathlib commit https://github.com/leanprover-community/mathlib/commit/917c3c072e487b3cccdbfeff17e75b40e45f66cb

@@ -91,8 +91,7 @@ theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
     ContinuousOn (extendFrom (Ioo a b) f) (Ico a b) :=
   by
   apply continuousOn_extendFrom
-  · rw [closure_Ioo hab.ne]
-    exact Ico_subset_Icc_self
+  · rw [closure_Ioo hab.ne]; exact Ico_subset_Icc_self
   · intro x x_in
     rcases eq_left_or_mem_Ioo_of_mem_Ico x_in with (rfl | h)
     · use la

mathlib commit https://github.com/leanprover-community/mathlib/commit/0b9eaaa7686280fad8cce467f5c3c57ee6ce77f8

@@ -29,7 +29,7 @@ variable {α : Type u} {β : Type v}
 
 /- warning: continuous_on_Icc_extend_from_Ioo -> continuousOn_Icc_extendFrom_Ioo is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β} {lb : β}, (Ne.{succ u1} α a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Icc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
+  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β} {lb : β}, (Ne.{succ u1} α a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Icc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
 but is expected to have type
   forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β} {lb : β}, (Ne.{succ u2} α a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Icc.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
 Case conversion may be inaccurate. Consider using '#align continuous_on_Icc_extend_from_Ioo continuousOn_Icc_extendFrom_Iooₓ'. -/
@@ -49,7 +49,7 @@ theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
 
 /- warning: eq_lim_at_left_extend_from_Ioo -> eq_lim_at_left_extendFrom_Ioo is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f a) la)
+  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f a) la)
 but is expected to have type
   forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : T2Space.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (Eq.{succ u1} β (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f a) la)
 Case conversion may be inaccurate. Consider using '#align eq_lim_at_left_extend_from_Ioo eq_lim_at_left_extendFrom_Iooₓ'. -/
@@ -65,7 +65,7 @@ theorem eq_lim_at_left_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [De
 
 /- warning: eq_lim_at_right_extend_from_Ioo -> eq_lim_at_right_extendFrom_Ioo is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f b) lb)
+  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : T2Space.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (Eq.{succ u2} β (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f b) lb)
 but is expected to have type
   forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : T2Space.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (Eq.{succ u1} β (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f b) lb)
 Case conversion may be inaccurate. Consider using '#align eq_lim_at_right_extend_from_Ioo eq_lim_at_right_extendFrom_Iooₓ'. -/
@@ -81,7 +81,7 @@ theorem eq_lim_at_right_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [D
 
 /- warning: continuous_on_Ico_extend_from_Ioo -> continuousOn_Ico_extendFrom_Ioo is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ico.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
+  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 a (Set.Ioi.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a)) (nhds.{u2} β _inst_5 la)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ico.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
 but is expected to have type
   forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {la : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 a (Set.Ioi.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a)) (nhds.{u1} β _inst_5 la)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Ico.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
 Case conversion may be inaccurate. Consider using '#align continuous_on_Ico_extend_from_Ioo continuousOn_Ico_extendFrom_Iooₓ'. -/
@@ -102,7 +102,7 @@ theorem continuousOn_Ico_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [
 
 /- warning: continuous_on_Ioc_extend_from_Ioo -> continuousOn_Ioc_extendFrom_Ioo is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ioc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
+  forall {α : Type.{u1}} {β : Type.{u2}} [_inst_1 : TopologicalSpace.{u1} α] [_inst_2 : LinearOrder.{u1} α] [_inst_3 : DenselyOrdered.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))))] [_inst_4 : OrderTopology.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))] [_inst_5 : TopologicalSpace.{u2} β] [_inst_6 : RegularSpace.{u2} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2))))) a b) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 f (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b)) -> (Filter.Tendsto.{u1, u2} α β f (nhdsWithin.{u1} α _inst_1 b (Set.Iio.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) b)) (nhds.{u2} β _inst_5 lb)) -> (ContinuousOn.{u1, u2} α β _inst_1 _inst_5 (extendFrom.{u1, u2} α β _inst_1 _inst_5 (Set.Ioo.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b) f) (Set.Ioc.{u1} α (PartialOrder.toPreorder.{u1} α (SemilatticeInf.toPartialOrder.{u1} α (Lattice.toSemilatticeInf.{u1} α (LinearOrder.toLattice.{u1} α _inst_2)))) a b))
 but is expected to have type
   forall {α : Type.{u2}} {β : Type.{u1}} [_inst_1 : TopologicalSpace.{u2} α] [_inst_2 : LinearOrder.{u2} α] [_inst_3 : DenselyOrdered.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))))] [_inst_4 : OrderTopology.{u2} α _inst_1 (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))] [_inst_5 : TopologicalSpace.{u1} β] [_inst_6 : RegularSpace.{u1} β _inst_5] {f : α -> β} {a : α} {b : α} {lb : β}, (LT.lt.{u2} α (Preorder.toLT.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2)))))) a b) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 f (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b)) -> (Filter.Tendsto.{u2, u1} α β f (nhdsWithin.{u2} α _inst_1 b (Set.Iio.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) b)) (nhds.{u1} β _inst_5 lb)) -> (ContinuousOn.{u2, u1} α β _inst_1 _inst_5 (extendFrom.{u2, u1} α β _inst_1 _inst_5 (Set.Ioo.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b) f) (Set.Ioc.{u2} α (PartialOrder.toPreorder.{u2} α (SemilatticeInf.toPartialOrder.{u2} α (Lattice.toSemilatticeInf.{u2} α (DistribLattice.toLattice.{u2} α (instDistribLattice.{u2} α _inst_2))))) a b))
 Case conversion may be inaccurate. Consider using '#align continuous_on_Ioc_extend_from_Ioo continuousOn_Ioc_extendFrom_Iooₓ'. -/

mathlib commit https://github.com/leanprover-community/mathlib/commit/bd9851ca476957ea4549eb19b40e7b5ade9428cc

This splits up the file Mathlib/Topology/Order/Basic.lean (currently > 2000 lines) into several smaller files.

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov
 -/
 import Mathlib.Topology.ExtendFrom
-import Mathlib.Topology.Order.Basic
+import Mathlib.Topology.Order.DenselyOrdered
 
 #align_import topology.algebra.order.extend_from from "leanprover-community/mathlib"@"0a0ec35061ed9960bf0e7ffb0335f44447b58977"
 

Move files from Topology.Algebra.Order to Topology.Order when they do not contain any algebra. Also move Topology.LocalExtr to Topology.Order.LocalExtr.

According to git, the moves are:

• Mathlib/Topology/{Algebra => }/Order/ExtendFrom.lean
• Mathlib/Topology/{Algebra => }/Order/ExtrClosure.lean
• Mathlib/Topology/{Algebra => }/Order/Filter.lean
• Mathlib/Topology/{Algebra => }/Order/IntermediateValue.lean
• Mathlib/Topology/{Algebra => }/Order/LeftRight.lean
• Mathlib/Topology/{Algebra => }/Order/LeftRightLim.lean
• Mathlib/Topology/{Algebra => }/Order/MonotoneContinuity.lean
• Mathlib/Topology/{Algebra => }/Order/MonotoneConvergence.lean
• Mathlib/Topology/{Algebra => }/Order/ProjIcc.lean
• Mathlib/Topology/{Algebra => }/Order/T5.lean
• Mathlib/Topology/{ => Order}/LocalExtr.lean

@@ -3,8 +3,8 @@ Copyright (c) 2017 Johannes Hölzl. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov
 -/
-import Mathlib.Topology.Order.Basic
 import Mathlib.Topology.ExtendFrom
+import Mathlib.Topology.Order.Basic
 
 #align_import topology.algebra.order.extend_from from "leanprover-community/mathlib"@"0a0ec35061ed9960bf0e7ffb0335f44447b58977"
 

We remove all but one open Classicals, instead preferring to use open scoped Classical. The only real side-effect this led to is moving a couple declarations to use Exists.choose instead of Classical.choose.

The first few commits are explicitly labelled regex replaces for ease of review.

@@ -17,7 +17,8 @@ set_option autoImplicit true
 
 open Filter Set TopologicalSpace
 
-open Topology Classical
+open scoped Classical
+open Topology
 
 theorem continuousOn_Icc_extendFrom_Ioo [TopologicalSpace α] [LinearOrder α] [DenselyOrdered α]
     [OrderTopology α] [TopologicalSpace β] [RegularSpace β] {f : α → β} {a b : α} {la lb : β}

Autoimplicits are highly controversial and also defeat the performance-improving work in #6474.

The intent of this PR is to make autoImplicit opt-in on a per-file basis, by disabling it in the lakefile and enabling it again with set_option autoImplicit true in the few files that rely on it.

That also keeps this PR small, as opposed to attempting to "fix" files to not need it any more.

I claim that many of the uses of autoImplicit in these files are accidental; situations such as:

• Assuming variables are in scope, but pasting the lemma in the wrong section
• Pasting in a lemma from a scratch file without checking to see if the variable names are consistent with the rest of the file
• Making a copy-paste error between lemmas and forgetting to add an explicit arguments.

Having set_option autoImplicit false as the default prevents these types of mistake being made in the 90% of files where autoImplicits are not used at all, and causes them to be caught by CI during review.

I think there were various points during the port where we encouraged porters to delete the universes u v lines; I think having autoparams for universe variables only would cover a lot of the cases we actually use them, while avoiding any real shortcomings.

A Zulip poll (after combining overlapping votes accordingly) was in favor of this change with 5:5:18 as the no:dontcare:yes vote ratio.

While this PR was being reviewed, a handful of files gained some more likely-accidental autoImplicits. In these places, set_option autoImplicit true has been placed locally within a section, rather than at the top of the file.

@@ -12,6 +12,8 @@ import Mathlib.Topology.ExtendFrom
 # Lemmas about `extendFrom` in an order topology.
 -/
 
+set_option autoImplicit true
+
 
 open Filter Set TopologicalSpace
 

• depends on: #5966

Co-authored-by: Eric Wieser <wieser.eric@gmail.com> Co-authored-by: Scott Morrison <scott.morrison@gmail.com>

@@ -2,15 +2,12 @@
 Copyright (c) 2017 Johannes Hölzl. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Johannes Hölzl, Mario Carneiro, Yury Kudryashov
-
-! This file was ported from Lean 3 source module topology.algebra.order.extend_from
-! leanprover-community/mathlib commit 0a0ec35061ed9960bf0e7ffb0335f44447b58977
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Topology.Order.Basic
 import Mathlib.Topology.ExtendFrom
 
+#align_import topology.algebra.order.extend_from from "leanprover-community/mathlib"@"0a0ec35061ed9960bf0e7ffb0335f44447b58977"
+
 /-!
 # Lemmas about `extendFrom` in an order topology.
 -/

Co-authored-by: Johan Commelin <johan@commelin.net>