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feat(CategoryTheory/Localization): transport resolutions along 2-commutative squares#39265

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feat(CategoryTheory/Localization): transport resolutions along 2-commutative squares#39265
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joelriou:catcommsq-resolutions

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We transport LocalizerMorphism.HasLeft/RightResolutions assumptions along 2-commutative squares.


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@joelriou joelriou added the t-category-theory Category theory label May 12, 2026
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PR summary 424dce2f30

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference
9 files Mathlib.AlgebraicTopology.ModelCategory.DerivabilityStructureCofibrant Mathlib.AlgebraicTopology.ModelCategory.DerivabilityStructureFibrant Mathlib.CategoryTheory.Localization.DerivabilityStructure.Basic Mathlib.CategoryTheory.Localization.DerivabilityStructure.Constructor Mathlib.CategoryTheory.Localization.DerivabilityStructure.Derives Mathlib.CategoryTheory.Localization.DerivabilityStructure.OfFunctorialResolutions Mathlib.CategoryTheory.Localization.DerivabilityStructure.OfLocalizedEquivalences Mathlib.CategoryTheory.Localization.DerivabilityStructure.PointwiseRightDerived Mathlib.CategoryTheory.Localization.Resolution
1
Mathlib.CategoryTheory.Comma.CatCommSq (new file) 311

Declarations diff

+ catCommSq
+ essSurj_mapArrow
+ hasLeftResolutions_arrow_iff_of_equivalences
+ hasLeftResolutions_arrow_of_essSurj_of_full
+ hasLeftResolutions_iff_iso_of_essSurj_of_full
+ hasLeftResolutions_of_iso_of_essSurj
+ hasLeftResolutions_of_iso_of_essSurj_of_full
+ hasRightResolutions_arrow_iff_of_equivalences
+ hasRightResolutions_arrow_of_essSurj_of_full
+ hasRightResolutions_iff_iso_of_essSurj_of_full
+ hasRightResolutions_of_iso_of_essSurj
+ hasRightResolutions_of_iso_of_essSurj_of_full
+ instance (W : MorphismProperty C) [W.RespectsIso] : W.arrow.RespectsIso
+ instance [Φ.IsInduced] : Φ.arrow.IsInduced

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.

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