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[Merged by Bors] - feat: more properties of homology in preadditive categories #7817

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This PR also introduces the notion of homotopy of morphisms between short complexes in preadditive categories.


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digama0 commented Oct 21, 2023

Note: I have pushed an update to the lean toolchain because this PR was on a buggy version of the toolchain. WARNING: checking out old commits of this PR using v4.2.0-rc2 or v4.2.0-rc3 can cause lake clean to delete your mathlib folder! If you need to do so, make sure to delete lakefile.olean manually before running any lake commands.

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Thanks 🎉

bors merge

@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot added ready-to-merge This PR has been sent to bors. and removed awaiting-review labels Oct 27, 2023
bors bot pushed a commit that referenced this pull request Oct 27, 2023
This PR also introduces the notion of homotopy of morphisms between short complexes in preadditive categories.



Co-authored-by: Mario Carneiro <di.gama@gmail.com>
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bors bot commented Oct 27, 2023

Pull request successfully merged into master.

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@bors bors bot changed the title feat: more properties of homology in preadditive categories [Merged by Bors] - feat: more properties of homology in preadditive categories Oct 27, 2023
@bors bors bot closed this Oct 27, 2023
@bors bors bot deleted the shortcomplex_preadditive2 branch October 27, 2023 08:33
grunweg pushed a commit that referenced this pull request Nov 1, 2023
This PR also introduces the notion of homotopy of morphisms between short complexes in preadditive categories.



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