data.countable.small | 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

bbeb185d

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

c3291da4

bump to nightly-2024-04-06-08

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

e34029c9

Diff

@@ -3,7 +3,7 @@ Copyright (c) 2021 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
-import Logic.Small.Basic
+import Logic.Small.Defs
 import Data.Countable.Defs
 
 #align_import data.countable.small from "leanprover-community/mathlib"@"c3291da49cfa65f0d43b094750541c0731edc932"
@@ -20,10 +20,10 @@ That is, any countable type is equivalent to a type in any universe.
 
 universe w v
 
-#print small_of_countable /-
-instance (priority := 100) small_of_countable (α : Type v) [Countable α] : Small.{w} α :=
+#print Countable.toSmall /-
+instance (priority := 100) Countable.toSmall (α : Type v) [Countable α] : Small.{w} α :=
   let ⟨f, hf⟩ := exists_injective_nat α
   small_of_injective hf
-#align small_of_countable small_of_countable
+#align small_of_countable Countable.toSmall
 -/

c3291da4

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) 2021 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
 -/
-import Mathbin.Logic.Small.Basic
-import Mathbin.Data.Countable.Defs
+import Logic.Small.Basic
+import Data.Countable.Defs
 
 #align_import data.countable.small 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

@@ -2,15 +2,12 @@
 Copyright (c) 2021 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
-
-! This file was ported from Lean 3 source module data.countable.small
-! 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.Logic.Small.Basic
 import Mathbin.Data.Countable.Defs
 
+#align_import data.countable.small from "leanprover-community/mathlib"@"c3291da49cfa65f0d43b094750541c0731edc932"
+
 /-!
 # All countable types are small.

c3291da4

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

bbeb185d

fix: name collision on Countable.toSmall (#11914)

This is currently causing mathport to fail, it's a new kind of name collision that has not occurred before: two definitions made in two different files are being #aligned to the same thing. Normally mathport will automatically rename one of them but in this case neither one imports the other so it doesn't know to avoid the situation.

Co-authored-by: Mario Carneiro <di.gama@gmail.com>

1d98ecad

Diff

@@ -22,7 +22,7 @@ instance (priority := 100) Countable.toSmall (α : Type v) [Countable α] : Smal
   let ⟨_, hf⟩ := exists_injective_nat α
   small_of_injective hf
 #align small_of_countable Countable.toSmall
-#align small_of_fintype Countable.toSmall
+#align small_of_fintype Countable.toSmallₓ -- this alignment clashes with the one above
 
 @[deprecated, nolint defLemma] -- 2024-03-20
 alias small_of_countable := Countable.toSmall

bbeb185d

feat: remove superseded small_of_fintype (#11326)

b163aa02

Diff

@@ -7,6 +7,7 @@ import Mathlib.Logic.Small.Basic
 import Mathlib.Data.Countable.Defs
 
 #align_import data.countable.small from "leanprover-community/mathlib"@"bbeb185db4ccee8ed07dc48449414ebfa39cb821"
+#align_import data.fintype.small from "leanprover-community/mathlib"@"1126441d6bccf98c81214a0780c73d499f6721fe"
 
 /-!
 # All countable types are small.
@@ -17,7 +18,14 @@ That is, any countable type is equivalent to a type in any universe.
 
 universe w v
 
-instance (priority := 100) small_of_countable (α : Type v) [Countable α] : Small.{w} α :=
+instance (priority := 100) Countable.toSmall (α : Type v) [Countable α] : Small.{w} α :=
   let ⟨_, hf⟩ := exists_injective_nat α
   small_of_injective hf
-#align small_of_countable small_of_countable
+#align small_of_countable Countable.toSmall
+#align small_of_fintype Countable.toSmall
+
+@[deprecated, nolint defLemma] -- 2024-03-20
+alias small_of_countable := Countable.toSmall
+
+@[deprecated, nolint defLemma] -- 2024-03-20
+alias small_of_fintype := Countable.toSmall

bbeb185d

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) 2021 Scott Morrison. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Scott Morrison
-
-! This file was ported from Lean 3 source module data.countable.small
-! leanprover-community/mathlib commit bbeb185db4ccee8ed07dc48449414ebfa39cb821
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.Logic.Small.Basic
 import Mathlib.Data.Countable.Defs
 
+#align_import data.countable.small from "leanprover-community/mathlib"@"bbeb185db4ccee8ed07dc48449414ebfa39cb821"
+
 /-!
 # All countable types are small.

bbeb185d

feat: port data.countable.small (#1128)

Port of Data.Countable.Small

based on bbeb185d

f7e13bf9

`data.countable.small` ⟷ `Mathlib.Data.Countable.Small`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 43

data.countable.small ⟷ Mathlib.Data.Countable.Small

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 43

`data.countable.small` ⟷ `Mathlib.Data.Countable.Small`