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feat(CategoryTheory/Triangulated): localizing subcategories#38651

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joelriou wants to merge 33 commits intoleanprover-community:masterfrom
joelriou:localizing-subcategory
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feat(CategoryTheory/Triangulated): localizing subcategories#38651
joelriou wants to merge 33 commits intoleanprover-community:masterfrom
joelriou:localizing-subcategory

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@joelriou joelriou commented Apr 28, 2026

@joelriou joelriou added the t-category-theory Category theory label Apr 28, 2026
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github-actions Bot commented Apr 28, 2026

PR summary e336692c24

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ IsVerdierLeftLocalizing.fullyFaithful
+ IsVerdierRightLocalizing.fullyFaithful
+ instance : ((A.triangulatedLocalizerMorphism B).localizedFunctor L₁ L₂).Faithful := by
+ instance : ((A.triangulatedLocalizerMorphism B).localizedFunctor L₁ L₂).Full := by
+ instance [A.IsVerdierLeftLocalizing B] :
+ instance [A.IsVerdierLeftLocalizing B] [Preadditive D₁] [Preadditive D₂]
+ instance [A.IsVerdierRightLocalizing B] :
+ instance [Preadditive D₁] [Preadditive D₂] [L₁.Additive] [L₂.Additive] :
+ inverseImage_opEquivalence_inverse_trW_inverseImage_ι_op
+ trW_inverseImage_ι_iff
+ triangulatedLocalizerMorphism
++ instance [A.IsTriangulated] :

You can run this locally as follows
## from your `mathlib4` directory:
git clone https://github.com/leanprover-community/mathlib-ci.git ../mathlib-ci

## summary with just the declaration names:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh <optional_commit>

## more verbose report:
../mathlib-ci/scripts/pr_summary/declarations_diff.sh long <optional_commit>

The doc-module for scripts/pr_summary/declarations_diff.sh in the mathlib-ci repository contains some details about this script.


No changes to strong technical debt.
No changes to weak technical debt.

@joelriou joelriou added the WIP Work in progress label Apr 28, 2026
@mathlib-dependent-issues mathlib-dependent-issues Bot added the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Apr 28, 2026
@github-actions github-actions Bot added the large-import Automatically added label for PRs with a significant increase in transitive imports label Apr 29, 2026
@github-actions github-actions Bot removed the large-import Automatically added label for PRs with a significant increase in transitive imports label May 5, 2026
@mathlib-dependent-issues mathlib-dependent-issues Bot removed the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label May 6, 2026
@mathlib-merge-conflicts mathlib-merge-conflicts Bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label May 6, 2026
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This pull request has conflicts, please merge master and resolve them.

@github-actions github-actions Bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label May 6, 2026
@mathlib-dependent-issues mathlib-dependent-issues Bot added the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label May 6, 2026
mathlib-bors Bot pushed a commit that referenced this pull request May 7, 2026
…ries (#38987)

Let `C` be a pretriangulated category. If `A` and `B` are triangulated subcategories of `C`, we define predicates (typeclasses `IsVerdierRightLocalizing` and `IsVerdierLeftLocalizing`) saying that `A` is right `B`-localizing (or left `B`-localizing). When `B` is closed under isomorphisms, we shall show that this implies that the functor from the Verdier quotient `A/(A ⊓ B)` to `C/B` is fully faithful (#38651).
@joelriou joelriou removed WIP Work in progress blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) labels May 7, 2026
Comment thread Mathlib/CategoryTheory/Triangulated/LocalizingSubcategory.lean Outdated
Comment thread Mathlib/CategoryTheory/Triangulated/LocalizingSubcategory.lean Outdated
@dagurtomas dagurtomas added the awaiting-author A reviewer has asked the author a question or requested changes. label May 7, 2026
@joelriou joelriou removed the awaiting-author A reviewer has asked the author a question or requested changes. label May 7, 2026
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