data.fintype.parity | 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

509de852

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

327c3c0d

bump to nightly-2024-02-12-08

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

56ad230b

Diff

@@ -28,11 +28,9 @@ instance IsSquare.decidablePred [Mul α] [Fintype α] [DecidableEq α] :
 
 end Fintype
 
-#print Fintype.card_fin_even /-
 /-- The cardinality of `fin (bit0 n)` is even, `fact` version.
 This `fact` is needed as an instance by `matrix.special_linear_group.has_neg`. -/
 theorem Fintype.card_fin_even {n : ℕ} : Fact (Even (Fintype.card (Fin (bit0 n)))) :=
   ⟨by rw [Fintype.card_fin]; exact even_bit0 _⟩
 #align fintype.card_fin_even Fintype.card_fin_even
--/

327c3c0d

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) 2017 Mario Carneiro. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Mario Carneiro
 -/
-import Mathbin.Data.Fintype.Card
-import Mathbin.Algebra.Parity
+import Data.Fintype.Card
+import Algebra.Parity
 
 #align_import data.fintype.parity from "leanprover-community/mathlib"@"327c3c0d9232d80e250dc8f65e7835b82b266ea5"

327c3c0d

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) 2017 Mario Carneiro. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Mario Carneiro
-
-! This file was ported from Lean 3 source module data.fintype.parity
-! leanprover-community/mathlib commit 327c3c0d9232d80e250dc8f65e7835b82b266ea5
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.Data.Fintype.Card
 import Mathbin.Algebra.Parity
 
+#align_import data.fintype.parity from "leanprover-community/mathlib"@"327c3c0d9232d80e250dc8f65e7835b82b266ea5"
+
 /-!
 # The cardinality of `fin (bit0 n)` is even.

327c3c0d

bump to nightly-2023-05-28-04

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

6797a637

Diff

@@ -35,9 +35,7 @@ end Fintype
 /-- The cardinality of `fin (bit0 n)` is even, `fact` version.
 This `fact` is needed as an instance by `matrix.special_linear_group.has_neg`. -/
 theorem Fintype.card_fin_even {n : ℕ} : Fact (Even (Fintype.card (Fin (bit0 n)))) :=
-  ⟨by
-    rw [Fintype.card_fin]
-    exact even_bit0 _⟩
+  ⟨by rw [Fintype.card_fin]; exact even_bit0 _⟩
 #align fintype.card_fin_even Fintype.card_fin_even
 -/

327c3c0d

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

509de852

chore: remove Fintype.card_fin_even (#10273)

This instance was meant to apply to even literal numbers. Because Lean 4 no longer uses bit0/bit1 for literals, it no longer serves that purpose. Instead, a specific instance for Fin 2 is added.

7d2b303e

Diff

@@ -9,7 +9,7 @@ import Mathlib.Algebra.Parity
 #align_import data.fintype.parity from "leanprover-community/mathlib"@"509de852e1de55e1efa8eacfa11df0823f26f226"
 
 /-!
-# The cardinality of `Fin (bit0 n)` is even.
+# The cardinality of `Fin 2` is even.
 -/
 
 
@@ -21,12 +21,10 @@ instance IsSquare.decidablePred [Mul α] [Fintype α] [DecidableEq α] :
     DecidablePred (IsSquare : α → Prop) := fun _ => Fintype.decidableExistsFintype
 #align fintype.is_square.decidable_pred Fintype.IsSquare.decidablePred
 
-end Fintype
-
-set_option linter.deprecated false
+/-- The cardinality of `Fin 2` is even, `Fact` version.
+This `Fact` is needed as an instance by `Matrix.SpecialLinearGroup.instNeg`. -/
+instance card_fin_two : Fact (Even (Fintype.card (Fin 2))) :=
+  ⟨⟨1, rfl⟩⟩
+#noalign fintype.card_fin_even
 
-/-- The cardinality of `Fin (bit0 n)` is even, `Fact` version.
-This `Fact` is needed as an instance by `Matrix.SpecialLinearGroup.has_neg`. -/
-theorem Fintype.card_fin_even {n : ℕ} : Fact (Even (Fintype.card (Fin (bit0 n)))) :=
-  ⟨by rw [Fintype.card_fin]; exact even_bit0 _⟩
-#align fintype.card_fin_even Fintype.card_fin_even
+end Fintype

509de852

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

@@ -13,7 +13,7 @@ import Mathlib.Algebra.Parity
 -/
 
 
-variable {α : Type _}
+variable {α : Type*}
 
 namespace Fintype

509de852

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) 2017 Mario Carneiro. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Mario Carneiro
-
-! This file was ported from Lean 3 source module data.fintype.parity
-! leanprover-community/mathlib commit 509de852e1de55e1efa8eacfa11df0823f26f226
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Data.Fintype.Card
 import Mathlib.Algebra.Parity
 
+#align_import data.fintype.parity from "leanprover-community/mathlib"@"509de852e1de55e1efa8eacfa11df0823f26f226"
+
 /-!
 # The cardinality of `Fin (bit0 n)` is even.
 -/

509de852

chore: fix upper/lowercase in comments (#4360)

Run a non-interactive version of fix-comments.py on all files.
Go through the diff and manually add/discard/edit chunks.

27d257fc

Diff

@@ -28,8 +28,8 @@ end Fintype
 
 set_option linter.deprecated false
 
-/-- The cardinality of `Fin (bit0 n)` is even, `fact` version.
-This `fact` is needed as an instance by `Matrix.SpecialLinearGroup.has_neg`. -/
+/-- The cardinality of `Fin (bit0 n)` is even, `Fact` version.
+This `Fact` is needed as an instance by `Matrix.SpecialLinearGroup.has_neg`. -/
 theorem Fintype.card_fin_even {n : ℕ} : Fact (Even (Fintype.card (Fin (bit0 n)))) :=
   ⟨by rw [Fintype.card_fin]; exact even_bit0 _⟩
 #align fintype.card_fin_even Fintype.card_fin_even

509de852

feat: port Data.Fintype.Parity (#1680)

Co-authored-by: qawbecrdtey <qawbecrdtey@naver.com>

9f2128bf

`data.fintype.parity` ⟷ `Mathlib.Data.Fintype.Parity`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 2 + 165

data.fintype.parity ⟷ Mathlib.Data.Fintype.Parity

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 2 + 165

`data.fintype.parity` ⟷ `Mathlib.Data.Fintype.Parity`