data.int.sqrt | 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

ba2245ed

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

c3291da4

bump to nightly-2024-04-09-08

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

659ec6f7

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2018 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
-import Data.Nat.Sqrt
+import Data.Nat.Defs
 
 #align_import data.int.sqrt from "leanprover-community/mathlib"@"c3291da49cfa65f0d43b094750541c0731edc932"

c3291da4

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -44,7 +44,7 @@ theorem exists_mul_self (x : ℤ) : (∃ n, n * n = x) ↔ sqrt x * sqrt x = x :
 
 #print Int.sqrt_nonneg /-
 theorem sqrt_nonneg (n : ℤ) : 0 ≤ sqrt n :=
-  coe_nat_nonneg _
+  natCast_nonneg _
 #align int.sqrt_nonneg Int.sqrt_nonneg
 -/

c3291da4

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2018 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
-import Mathbin.Data.Nat.Sqrt
+import Data.Nat.Sqrt
 
 #align_import data.int.sqrt from "leanprover-community/mathlib"@"c3291da49cfa65f0d43b094750541c0731edc932"

c3291da4

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,14 +2,11 @@
 Copyright (c) 2018 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
-
-! This file was ported from Lean 3 source module data.int.sqrt
-! leanprover-community/mathlib commit c3291da49cfa65f0d43b094750541c0731edc932
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Data.Nat.Sqrt
 
+#align_import data.int.sqrt from "leanprover-community/mathlib"@"c3291da49cfa65f0d43b094750541c0731edc932"
+
 /-!
 # Square root of integers

c3291da4

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

ba2245ed

chore(Data/Nat/Defs): Integrate Nat.sqrt material (#11866)

Move the content of Data.Nat.ForSqrt and Data.Nat.Sqrt to Data.Nat.Defs by using Nat-specific Std lemmas rather than the mathlib general ones. This makes it ready to move to Std if wanted.

d4b9a267

Diff

@@ -3,7 +3,9 @@ Copyright (c) 2018 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
 -/
-import Mathlib.Data.Nat.Sqrt
+import Mathlib.Data.Int.Defs
+import Mathlib.Data.Nat.Defs
+import Mathlib.Tactic.Common
 
 #align_import data.int.sqrt from "leanprover-community/mathlib"@"ba2245edf0c8bb155f1569fd9b9492a9b384cde6"
 
@@ -37,9 +39,4 @@ theorem sqrt_nonneg (n : ℤ) : 0 ≤ sqrt n :=
   natCast_nonneg _
 #align int.sqrt_nonneg Int.sqrt_nonneg
 
-/-- `IsSquare` can be decided on `ℤ` by checking against the square root. -/
-instance : DecidablePred (IsSquare : ℤ → Prop) :=
-  fun m => decidable_of_iff' (sqrt m * sqrt m = m) <| by
-    simp_rw [← exists_mul_self m, IsSquare, eq_comm]
-
 end Int

ba2245ed

chore(Data/Int): Rename coe_nat to natCast (#11637)

Reduce the diff of #11499

Renames

All in the Int namespace:

ofNat_eq_cast → ofNat_eq_natCast
cast_eq_cast_iff_Nat → natCast_inj
natCast_eq_ofNat → ofNat_eq_natCast
coe_nat_sub → natCast_sub
coe_nat_nonneg → natCast_nonneg
sign_coe_add_one → sign_natCast_add_one
nat_succ_eq_int_succ → natCast_succ
succ_neg_nat_succ → succ_neg_natCast_succ
coe_pred_of_pos → natCast_pred_of_pos
coe_nat_div → natCast_div
coe_nat_ediv → natCast_ediv
sign_coe_nat_of_nonzero → sign_natCast_of_ne_zero
toNat_coe_nat → toNat_natCast
toNat_coe_nat_add_one → toNat_natCast_add_one
coe_nat_dvd → natCast_dvd_natCast
coe_nat_dvd_left → natCast_dvd
coe_nat_dvd_right → dvd_natCast
le_coe_nat_sub → le_natCast_sub
succ_coe_nat_pos → succ_natCast_pos
coe_nat_modEq_iff → natCast_modEq_iff
coe_natAbs → natCast_natAbs
coe_nat_eq_zero → natCast_eq_zero
coe_nat_ne_zero → natCast_ne_zero
coe_nat_ne_zero_iff_pos → natCast_ne_zero_iff_pos
abs_coe_nat → abs_natCast
coe_nat_nonpos_iff → natCast_nonpos_iff

Also rename Nat.coe_nat_dvd to Nat.cast_dvd_cast

392a24a9

Diff

@@ -26,7 +26,7 @@ def sqrt (z : ℤ) : ℤ :=
 #align int.sqrt Int.sqrt
 
 theorem sqrt_eq (n : ℤ) : sqrt (n * n) = n.natAbs := by
-  rw [sqrt, ← natAbs_mul_self, toNat_coe_nat, Nat.sqrt_eq]
+  rw [sqrt, ← natAbs_mul_self, toNat_natCast, Nat.sqrt_eq]
 #align int.sqrt_eq Int.sqrt_eq
 
 theorem exists_mul_self (x : ℤ) : (∃ n, n * n = x) ↔ sqrt x * sqrt x = x :=
@@ -34,7 +34,7 @@ theorem exists_mul_self (x : ℤ) : (∃ n, n * n = x) ↔ sqrt x * sqrt x = x :
 #align int.exists_mul_self Int.exists_mul_self
 
 theorem sqrt_nonneg (n : ℤ) : 0 ≤ sqrt n :=
-  coe_nat_nonneg _
+  natCast_nonneg _
 #align int.sqrt_nonneg Int.sqrt_nonneg
 
 /-- `IsSquare` can be decided on `ℤ` by checking against the square root. -/

ba2245ed

chore: space after ← (#8178)

Co-authored-by: Moritz Firsching <firsching@google.com>

5fb9beab

Diff

@@ -40,6 +40,6 @@ theorem sqrt_nonneg (n : ℤ) : 0 ≤ sqrt n :=
 /-- `IsSquare` can be decided on `ℤ` by checking against the square root. -/
 instance : DecidablePred (IsSquare : ℤ → Prop) :=
   fun m => decidable_of_iff' (sqrt m * sqrt m = m) <| by
-    simp_rw [←exists_mul_self m, IsSquare, eq_comm]
+    simp_rw [← exists_mul_self m, IsSquare, eq_comm]
 
 end Int

ba2245ed

feat(Data/*/Sqrt): decidability of IsSquare (#7935)

Zulip thread

9e92f67f

Diff

@@ -37,4 +37,9 @@ theorem sqrt_nonneg (n : ℤ) : 0 ≤ sqrt n :=
   coe_nat_nonneg _
 #align int.sqrt_nonneg Int.sqrt_nonneg
 
+/-- `IsSquare` can be decided on `ℤ` by checking against the square root. -/
+instance : DecidablePred (IsSquare : ℤ → Prop) :=
+  fun m => decidable_of_iff' (sqrt m * sqrt m = m) <| by
+    simp_rw [←exists_mul_self m, IsSquare, eq_comm]
+
 end Int

ba2245ed

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

@@ -2,14 +2,11 @@
 Copyright (c) 2018 Kenny Lau. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Kenny Lau
-
-! This file was ported from Lean 3 source module data.int.sqrt
-! leanprover-community/mathlib commit ba2245edf0c8bb155f1569fd9b9492a9b384cde6
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Data.Nat.Sqrt
 
+#align_import data.int.sqrt from "leanprover-community/mathlib"@"ba2245edf0c8bb155f1569fd9b9492a9b384cde6"
+
 /-!
 # Square root of integers

ba2245ed

feat: port Data.Int.Sqrt (#1167)

Only notable thing here is that @[pp_nodot] was commented out since that is currently an unknown attribute. Hope that's the way to do it!

1d0befd6

`data.int.sqrt` ⟷ `Mathlib.Data.Int.Sqrt`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Renames

Dependencies 2 + 121

data.int.sqrt ⟷ Mathlib.Data.Int.Sqrt

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Renames

Dependencies 2 + 121

`data.int.sqrt` ⟷ `Mathlib.Data.Int.Sqrt`