number_theory.class_number.function_field

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

d0259b01

(last sync)

Changes in mathlib3port

mathlib3

mathlib3port

30faa0c3

bump to nightly-2023-09-24-06

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

5655435f

Diff

@@ -3,9 +3,9 @@ Copyright (c) 2021 Anne Baanen. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Anne Baanen
 -/
-import Mathbin.NumberTheory.ClassNumber.AdmissibleCardPowDegree
-import Mathbin.NumberTheory.ClassNumber.Finite
-import Mathbin.NumberTheory.FunctionField
+import NumberTheory.ClassNumber.AdmissibleCardPowDegree
+import NumberTheory.ClassNumber.Finite
+import NumberTheory.FunctionField
 
 #align_import number_theory.class_number.function_field from "leanprover-community/mathlib"@"30faa0c3618ce1472bf6305ae0e3fa56affa3f95"

30faa0c3

bump to nightly-2023-07-20-09

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

9c56d0dd

Diff

@@ -2,16 +2,13 @@
 Copyright (c) 2021 Anne Baanen. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Anne Baanen
-
-! This file was ported from Lean 3 source module number_theory.class_number.function_field
-! leanprover-community/mathlib commit 30faa0c3618ce1472bf6305ae0e3fa56affa3f95
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathbin.NumberTheory.ClassNumber.AdmissibleCardPowDegree
 import Mathbin.NumberTheory.ClassNumber.Finite
 import Mathbin.NumberTheory.FunctionField
 
+#align_import number_theory.class_number.function_field from "leanprover-community/mathlib"@"30faa0c3618ce1472bf6305ae0e3fa56affa3f95"
+
 /-!
 # Class numbers of function fields

30faa0c3

bump to nightly-2023-06-27-03

mathlib commit https://github.com/leanprover-community/mathlib/commit/8b981918a93bc45a8600de608cde7944a80d92b9

b5e0c440

Diff

@@ -4,7 +4,7 @@ Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Anne Baanen
 
 ! This file was ported from Lean 3 source module number_theory.class_number.function_field
-! leanprover-community/mathlib commit d0259b01c82eed3f50390a60404c63faf9e60b1f
+! leanprover-community/mathlib commit 30faa0c3618ce1472bf6305ae0e3fa56affa3f95
 ! Please do not edit these lines, except to modify the commit id
 ! if you have ported upstream changes.
 -/
@@ -15,6 +15,9 @@ import Mathbin.NumberTheory.FunctionField
 /-!
 # Class numbers of function fields
 
+> THIS FILE IS SYNCHRONIZED WITH MATHLIB4.
+> Any changes to this file require a corresponding PR to mathlib4.
+
 This file defines the class number of a function field as the (finite) cardinality of
 the class group of its ring of integers. It also proves some elementary results
 on the class number.

d0259b01

bump to nightly-2023-06-24-21

mathlib commit https://github.com/leanprover-community/mathlib/commit/93f880918cb51905fd51b76add8273cbc27718ab

fad49451

Diff

@@ -50,16 +50,20 @@ noncomputable instance : Fintype (ClassGroup (ringOfIntegers Fq F)) :=
 
 end RingOfIntegers
 
+#print FunctionField.classNumber /-
 /-- The class number in a function field is the (finite) cardinality of the class group. -/
 noncomputable def classNumber : ℕ :=
   Fintype.card (ClassGroup (ringOfIntegers Fq F))
 #align function_field.class_number FunctionField.classNumber
+-/
 
+#print FunctionField.classNumber_eq_one_iff /-
 /-- The class number of a function field is `1` iff the ring of integers is a PID. -/
 theorem classNumber_eq_one_iff :
     classNumber Fq F = 1 ↔ IsPrincipalIdealRing (ringOfIntegers Fq F) :=
   card_classGroup_eq_one_iff
 #align function_field.class_number_eq_one_iff FunctionField.classNumber_eq_one_iff
+-/
 
 end FunctionField

d0259b01

bump to nightly-2023-05-28-18

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

8d353152

Diff

@@ -27,7 +27,7 @@ cardinality of the class group of its ring of integers
 
 namespace FunctionField
 
-open Polynomial
+open scoped Polynomial
 
 variable (Fq F : Type) [Field Fq] [Fintype Fq] [Field F]
 
@@ -37,7 +37,7 @@ variable [IsScalarTower Fq[X] (RatFunc Fq) F]
 
 variable [FunctionField Fq F] [IsSeparable (RatFunc Fq) F]
 
-open Classical
+open scoped Classical
 
 namespace RingOfIntegers

d0259b01

bump to nightly-2023-05-26-00

mathlib commit https://github.com/leanprover-community/mathlib/commit/ef95945cd48c932c9e034872bd25c3c220d9c946

6bc7c80e

Diff

@@ -31,11 +31,11 @@ open Polynomial
 
 variable (Fq F : Type) [Field Fq] [Fintype Fq] [Field F]
 
-variable [Algebra Fq[X] F] [Algebra (Ratfunc Fq) F]
+variable [Algebra Fq[X] F] [Algebra (RatFunc Fq) F]
 
-variable [IsScalarTower Fq[X] (Ratfunc Fq) F]
+variable [IsScalarTower Fq[X] (RatFunc Fq) F]
 
-variable [FunctionField Fq F] [IsSeparable (Ratfunc Fq) F]
+variable [FunctionField Fq F] [IsSeparable (RatFunc Fq) F]
 
 open Classical
 
@@ -44,7 +44,7 @@ namespace RingOfIntegers
 open FunctionField
 
 noncomputable instance : Fintype (ClassGroup (ringOfIntegers Fq F)) :=
-  ClassGroup.fintypeOfAdmissibleOfFinite (Ratfunc Fq) F
+  ClassGroup.fintypeOfAdmissibleOfFinite (RatFunc Fq) F
     (Polynomial.cardPowDegreeIsAdmissible :
       AbsoluteValue.IsAdmissible (Polynomial.cardPowDegree : AbsoluteValue Fq[X] ℤ))

d0259b01

bump to nightly-2023-02-21-16

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

1107b979

Changes in mathlib4

mathlib3

mathlib4

d0259b01

chore(*): remove empty lines between variable statements (#11418)

Empty lines were removed by executing the following Python script twice

import os
import re


# Loop through each file in the repository
for dir_path, dirs, files in os.walk('.'):
  for filename in files:
    if filename.endswith('.lean'):
      file_path = os.path.join(dir_path, filename)

      # Open the file and read its contents
      with open(file_path, 'r') as file:
        content = file.read()

      # Use a regular expression to replace sequences of "variable" lines separated by empty lines
      # with sequences without empty lines
      modified_content = re.sub(r'(variable.*\n)\n(variable(?! .* in))', r'\1\2', content)

      # Write the modified content back to the file
      with open(file_path, 'w') as file:
        file.write(modified_content)

75c86f04

Diff

@@ -27,11 +27,8 @@ namespace FunctionField
 open scoped Polynomial
 
 variable (Fq F : Type) [Field Fq] [Fintype Fq] [Field F]
-
 variable [Algebra Fq[X] F] [Algebra (RatFunc Fq) F]
-
 variable [IsScalarTower Fq[X] (RatFunc Fq) F]
-
 variable [FunctionField Fq F] [IsSeparable (RatFunc Fq) F]
 
 open scoped Classical

d0259b01

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

@@ -2,16 +2,13 @@
 Copyright (c) 2021 Anne Baanen. All rights reserved.
 Released under Apache 2.0 license as described in the file LICENSE.
 Authors: Anne Baanen
-
-! This file was ported from Lean 3 source module number_theory.class_number.function_field
-! leanprover-community/mathlib commit d0259b01c82eed3f50390a60404c63faf9e60b1f
-! Please do not edit these lines, except to modify the commit id
-! if you have ported upstream changes.
 -/
 import Mathlib.NumberTheory.ClassNumber.AdmissibleCardPowDegree
 import Mathlib.NumberTheory.ClassNumber.Finite
 import Mathlib.NumberTheory.FunctionField
 
+#align_import number_theory.class_number.function_field from "leanprover-community/mathlib"@"d0259b01c82eed3f50390a60404c63faf9e60b1f"
+
 /-!
 # Class numbers of function fields

d0259b01

feat: port NumberTheory.ClassNumber.FunctionField (#5455)

1c690d81

`number_theory.class_number.function_field` ⟷ `Mathlib.NumberTheory.ClassNumber.FunctionField`

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 12 + 961

number_theory.class_number.function_field ⟷ Mathlib.NumberTheory.ClassNumber.FunctionField

Changes since the initial port

Changes in mathlib3

Changes in mathlib3port

Changes in mathlib4

Dependencies 12 + 961

`number_theory.class_number.function_field` ⟷ `Mathlib.NumberTheory.ClassNumber.FunctionField`