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[Merged by Bors] - feat(AlgebraicTopology): transport a model category structure by an equivalence#39032

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[Merged by Bors] - feat(AlgebraicTopology): transport a model category structure by an equivalence#39032
joelriou wants to merge 6 commits intoleanprover-community:masterfrom
joelriou:model-category-transport

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@joelriou joelriou commented May 7, 2026

In a future PR, this will be used in order to dualise the model category structure from #38850 in order to get the projective model category structure on bounded above cochain complexes in a category that has enough projectives.


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@joelriou joelriou added t-category-theory Category theory t-algebraic-topology Algebraic topology labels May 7, 2026
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github-actions Bot commented May 7, 2026

PR summary 7bdf4031a0

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference
Mathlib.AlgebraicTopology.ModelCategory.Transport (new file) 651

Declarations diff

+ Functor.hasLiftingProperty_iff_of_isEquivalence
+ MapFactorizationData.ofIsEquivalence
+ ModelCategory.transport
+ instance (F : D ⥤ C) [F.IsEquivalence]
+ llp_ofHoms_iff_hasLiftingProperty
+ rlp_ofHoms_iff_hasLiftingProperty

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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Thanks!

maintainer delegate

Comment thread Mathlib/CategoryTheory/MorphismProperty/Factorization.lean Outdated
Comment thread Mathlib/AlgebraicTopology/ModelCategory/Transport.lean Outdated
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github-actions Bot commented May 7, 2026

🚀 Pull request has been placed on the maintainer queue by dagurtomas.

@mathlib-triage mathlib-triage Bot added the maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. label May 7, 2026
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Thanks!

bors d+

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mathlib-bors Bot commented May 7, 2026

✌️ joelriou can now approve this pull request. To approve and merge a pull request, simply reply with bors r+. More detailed instructions are available here.

@mathlib-triage mathlib-triage Bot added delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). and removed maintainer-merge A reviewer has approved the changed; awaiting maintainer approval. labels May 7, 2026
joelriou and others added 2 commits May 7, 2026 20:56
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joelriou commented May 7, 2026

Thanks!

bors merge

mathlib-bors Bot pushed a commit that referenced this pull request May 7, 2026
…quivalence (#39032)

In a future PR, this will be used in order to dualise the model category structure from #38850 in order to get the projective model category structure on bounded above cochain complexes in a category that has enough projectives.
@mathlib-triage mathlib-triage Bot added the ready-to-merge This PR has been sent to bors. label May 7, 2026
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mathlib-bors Bot commented May 7, 2026

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors Bot changed the title feat(AlgebraicTopology): transport a model category structure by an equivalence [Merged by Bors] - feat(AlgebraicTopology): transport a model category structure by an equivalence May 7, 2026
@mathlib-bors mathlib-bors Bot closed this May 7, 2026
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3 participants