topology.instances.sign | Mathlib porting status

Changes since the initial port

The following section lists changes to this file in mathlib3 and mathlib4 that occured after the initial port. Most recent changes are shown first. Hovering over a commit will show all commits associated with the same mathlib3 commit.

Changes in mathlib3

4c19a16e

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

50832dae

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,8 +3,8 @@ Copyright (c) 2022 Joseph Myers. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Joseph Myers
 -/
-import Mathbin.Data.Sign
-import Mathbin.Topology.Order.Basic
+import Data.Sign
+import Topology.Order.Basic
 
 #align_import topology.instances.sign from "leanprover-community/mathlib"@"50832daea47b195a48b5b33b1c8b2162c48c3afc"

50832dae

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,15 +2,12 @@
 Copyright (c) 2022 Joseph Myers. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Joseph Myers
-
-! This file was ported from Lean 3 source module topology.instances.sign
-! leanprover-community/mathlib commit 50832daea47b195a48b5b33b1c8b2162c48c3afc
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Data.Sign
 import Mathbin.Topology.Order.Basic
 
+#align_import topology.instances.sign from "leanprover-community/mathlib"@"50832daea47b195a48b5b33b1c8b2162c48c3afc"
+
 /-!
 # Topology on `sign_type`

50832dae

bump to nightly-2023-06-13-21

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

829520ac

Diff

@@ -35,19 +35,23 @@ section PartialOrder
 
 variable [PartialOrder α] [DecidableRel ((· < ·) : α → α → Prop)] [OrderTopology α]
 
+#print continuousAt_sign_of_pos /-
 theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.sign a :=
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (1 : SignType)) a).congr _
   rw [Filter.EventuallyEq, eventually_nhds_iff]
   exact ⟨{x | 0 < x}, fun x hx => (sign_pos hx).symm, isOpen_lt' 0, h⟩
 #align continuous_at_sign_of_pos continuousAt_sign_of_pos
+-/
 
+#print continuousAt_sign_of_neg /-
 theorem continuousAt_sign_of_neg {a : α} (h : a < 0) : ContinuousAt SignType.sign a :=
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (-1 : SignType)) a).congr _
   rw [Filter.EventuallyEq, eventually_nhds_iff]
   exact ⟨{x | x < 0}, fun x hx => (sign_neg hx).symm, isOpen_gt' 0, h⟩
 #align continuous_at_sign_of_neg continuousAt_sign_of_neg
+-/
 
 end PartialOrder

50832dae

bump to nightly-2023-06-04-18

mathlib commit https://github.com/leanprover-community/mathlib/commit/5f25c089cb34db4db112556f23c50d12da81b297

3fb4268b

Diff

@@ -39,14 +39,14 @@ theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.si
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (1 : SignType)) a).congr _
   rw [Filter.EventuallyEq, eventually_nhds_iff]
-  exact ⟨{ x | 0 < x }, fun x hx => (sign_pos hx).symm, isOpen_lt' 0, h⟩
+  exact ⟨{x | 0 < x}, fun x hx => (sign_pos hx).symm, isOpen_lt' 0, h⟩
 #align continuous_at_sign_of_pos continuousAt_sign_of_pos
 
 theorem continuousAt_sign_of_neg {a : α} (h : a < 0) : ContinuousAt SignType.sign a :=
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (-1 : SignType)) a).congr _
   rw [Filter.EventuallyEq, eventually_nhds_iff]
-  exact ⟨{ x | x < 0 }, fun x hx => (sign_neg hx).symm, isOpen_gt' 0, h⟩
+  exact ⟨{x | x < 0}, fun x hx => (sign_neg hx).symm, isOpen_gt' 0, h⟩
 #align continuous_at_sign_of_neg continuousAt_sign_of_neg
 
 end PartialOrder

50832dae

bump to nightly-2023-05-28-06

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

ba5d8b97

Diff

@@ -35,12 +35,6 @@ section PartialOrder
 
 variable [PartialOrder α] [DecidableRel ((· < ·) : α → α → Prop)] [OrderTopology α]
 
-/- warning: continuous_at_sign_of_pos -> continuousAt_sign_of_pos is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1))) a) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
-but is expected to have type
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.105 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.107 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.105 x._@.Mathlib.Topology.Instances.Sign._hyg.107)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1)) a) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
-Case conversion may be inaccurate. Consider using '#align continuous_at_sign_of_pos continuousAt_sign_of_posₓ'. -/
 theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.sign a :=
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (1 : SignType)) a).congr _
@@ -48,12 +42,6 @@ theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.si
   exact ⟨{ x | 0 < x }, fun x hx => (sign_pos hx).symm, isOpen_lt' 0, h⟩
 #align continuous_at_sign_of_pos continuousAt_sign_of_pos
 
-/- warning: continuous_at_sign_of_neg -> continuousAt_sign_of_neg is a dubious translation:
-lean 3 declaration is
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1)))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
-but is expected to have type
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.235 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.237 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.235 x._@.Mathlib.Topology.Instances.Sign._hyg.237)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
-Case conversion may be inaccurate. Consider using '#align continuous_at_sign_of_neg continuousAt_sign_of_negₓ'. -/
 theorem continuousAt_sign_of_neg {a : α} (h : a < 0) : ContinuousAt SignType.sign a :=
   by
   refine' (continuousAt_const : ContinuousAt (fun x => (-1 : SignType)) a).congr _

50832dae

bump to nightly-2023-05-16-16

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

9cb92e8c

Diff

@@ -37,7 +37,7 @@ variable [PartialOrder α] [DecidableRel ((· < ·) : α → α → Prop)] [Orde
 
 /- warning: continuous_at_sign_of_pos -> continuousAt_sign_of_pos is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1))) a) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
+  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1))) a) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 but is expected to have type
   forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.105 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.107 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.105 x._@.Mathlib.Topology.Instances.Sign._hyg.107)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1)) a) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 Case conversion may be inaccurate. Consider using '#align continuous_at_sign_of_pos continuousAt_sign_of_posₓ'. -/
@@ -50,7 +50,7 @@ theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.si
 
 /- warning: continuous_at_sign_of_neg -> continuousAt_sign_of_neg is a dubious translation:
 lean 3 declaration is
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1)))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
+  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toHasLt.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1)))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 but is expected to have type
   forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.235 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.237 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.235 x._@.Mathlib.Topology.Instances.Sign._hyg.237)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 Case conversion may be inaccurate. Consider using '#align continuous_at_sign_of_neg continuousAt_sign_of_negₓ'. -/

50832dae

bump to nightly-2023-03-11-22

mathlib commit https://github.com/leanprover-community/mathlib/commit/3180fab693e2cee3bff62675571264cb8778b212

a8ee822f

Diff

@@ -52,7 +52,7 @@ theorem continuousAt_sign_of_pos {a : α} (h : 0 < a) : ContinuousAt SignType.si
 lean 3 declaration is
   forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)))] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (OfNat.mk.{u1} α 0 (Zero.zero.{u1} α _inst_1)))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 SignType.topologicalSpace (coeFn.{succ u1, succ u1} (OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (fun (_x : OrderHom.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) => α -> SignType) (OrderHom.hasCoeToFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (LinearOrder.toLattice.{0} SignType SignType.linearOrder))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 but is expected to have type
-  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.234 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.236 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.234 x._@.Mathlib.Topology.Instances.Sign._hyg.236)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
+  forall {α : Type.{u1}} [_inst_1 : Zero.{u1} α] [_inst_2 : TopologicalSpace.{u1} α] [_inst_3 : PartialOrder.{u1} α] [_inst_4 : DecidableRel.{succ u1} α (fun (x._@.Mathlib.Topology.Instances.Sign._hyg.235 : α) (x._@.Mathlib.Topology.Instances.Sign._hyg.237 : α) => LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) x._@.Mathlib.Topology.Instances.Sign._hyg.235 x._@.Mathlib.Topology.Instances.Sign._hyg.237)] [_inst_5 : OrderTopology.{u1} α _inst_2 (PartialOrder.toPreorder.{u1} α _inst_3)] {a : α}, (LT.lt.{u1} α (Preorder.toLT.{u1} α (PartialOrder.toPreorder.{u1} α _inst_3)) a (OfNat.ofNat.{u1} α 0 (Zero.toOfNat0.{u1} α _inst_1))) -> (ContinuousAt.{u1, 0} α SignType _inst_2 instTopologicalSpaceSignType (OrderHom.toFun.{u1, 0} α SignType (PartialOrder.toPreorder.{u1} α _inst_3) (PartialOrder.toPreorder.{0} SignType (SemilatticeInf.toPartialOrder.{0} SignType (Lattice.toSemilatticeInf.{0} SignType (DistribLattice.toLattice.{0} SignType (instDistribLattice.{0} SignType SignType.instLinearOrderSignType))))) (SignType.sign.{u1} α _inst_1 (PartialOrder.toPreorder.{u1} α _inst_3) (fun (a : α) (b : α) => _inst_4 a b))) a)
 Case conversion may be inaccurate. Consider using '#align continuous_at_sign_of_neg continuousAt_sign_of_negₓ'. -/
 theorem continuousAt_sign_of_neg {a : α} (h : a < 0) : ContinuousAt SignType.sign a :=
   by

50832dae

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

4c19a16e

chore: banish Type _ and Sort _ (#6499)

We remove all possible occurences of Type _ and Sort _ in favor of Type* and Sort*.

This has nice performance benefits.

32de3f67

Diff

@@ -23,7 +23,7 @@ instance : TopologicalSpace SignType :=
 instance : DiscreteTopology SignType :=
   ⟨rfl⟩
 
-variable {α : Type _} [Zero α] [TopologicalSpace α]
+variable {α : Type*} [Zero α] [TopologicalSpace α]
 
 section PartialOrder

4c19a16e

chore: script to replace headers with #align_import statements (#5979)

depends on: #5966

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

89aa3a3b

Diff

@@ -2,15 +2,12 @@
 Copyright (c) 2022 Joseph Myers. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Joseph Myers
-
-! This file was ported from Lean 3 source module topology.instances.sign
-! leanprover-community/mathlib commit 4c19a16e4b705bf135cf9a80ac18fcc99c438514
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Data.Sign
 import Mathlib.Topology.Order.Basic
 
+#align_import topology.instances.sign from "leanprover-community/mathlib"@"4c19a16e4b705bf135cf9a80ac18fcc99c438514"
+
 /-!
 # Topology on `SignType`

4c19a16e

feat: Port/Topology.Instances.Sign (#2100)

port of topology.instances.sign

only docu fixes

0ae33195

`topology.instances.sign` ⟷ `Mathlib.Topology.Instances.Sign`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 328

topology.instances.sign ⟷ Mathlib.Topology.Instances.Sign

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 8 + 328

`topology.instances.sign` ⟷ `Mathlib.Topology.Instances.Sign`