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[Merged by Bors] - feat(Algebra/Homology/Embedding): the homology of an extension of homological complexes#19198

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[Merged by Bors] - feat(Algebra/Homology/Embedding): the homology of an extension of homological complexes#19198
joelriou wants to merge 12 commits intomasterfrom
algebra-homology-embedding-extend-homology

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@joelriou joelriou commented Nov 18, 2024 •
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Given an embedding e : c.Embedding c', K : HomologicalComplex C c, and degrees such that e.f j = j', we compute the homology of K.extend e in degree j' in terms of the homology of K in degree j.

This mostly dualizes #18502.

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@joelriou joelriou added the t-category-theory Category theory label Nov 18, 2024
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github-actions bot commented Nov 18, 2024 •
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PR summary 5913b2d11c

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ cokernelCofork
+ d_comp_desc_eq_zero_iff
+ d_comp_desc_eq_zero_iff'
+ d_comp_eq_zero_iff
+ hasHomology
+ homologyData
+ homologyData'
+ instance (j : ι) [K.HasHomology j] : (K.extend e).HasHomology (e.f j)
+ instance [∀ j, K.HasHomology j] (j' : ι') : (K.extend e).HasHomology j' := by
+ isColimitCokernelCofork
+ isLimitKernelFork
+ kernelFork
+ rightHomologyData

You can run this locally as follows 
## summary with just the declaration names:
./scripts/declarations_diff.sh <optional_commit>

## more verbose report:
./scripts/declarations_diff.sh long <optional_commit>

The doc-module for script/declarations_diff.sh contains some details about this script.

No changes to technical debt.

You can run this locally as

./scripts/technical-debt-metrics.sh pr_summary
  • The relative value is the weighted sum of the differences with weight given by the inverse of the current value of the statistic.
  • The absolute value is the relative value divided by the total sum of the inverses of the current values (i.e. the weighted average of the differences).

@mathlib4-dependent-issues-bot mathlib4-dependent-issues-bot added the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Nov 18, 2024
@joelriou joelriou mentioned this pull request Nov 18, 2024
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@joelriou joelriou changed the title feat(Algebra/Homology): the left homology of an extension of homological complexes feat(Algebra/Homology): the homology of an extension of homological complexes Nov 18, 2024
This was referenced Nov 28, 2024
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@joelriou joelriou changed the title feat(Algebra/Homology): the homology of an extension of homological complexes feat(Algebra/Homology/Embedding): the homology of an extension of homological complexes Nov 28, 2024
This was referenced Nov 28, 2024
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@mathlib4-dependent-issues-bot mathlib4-dependent-issues-bot removed the blocked-by-other-PR This PR depends on another PR (this label is automatically managed by a bot) label Nov 30, 2024
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mathlib4-dependent-issues-bot commented Nov 30, 2024

This PR/issue depends on:

@leanprover-community-bot-assistant leanprover-community-bot-assistant added the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Nov 30, 2024
@leanprover-community-bot-assistant leanprover-community-bot-assistant removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. (this label is managed by a bot) label Nov 30, 2024
jcommelin
jcommelin reviewed Dec 20, 2024
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Thanks 🎉

bors merge

@ghost ghost added the ready-to-merge This PR has been sent to bors. label Dec 20, 2024
mathlib-bors bot pushed a commit that referenced this pull request Dec 20, 2024
@joelriou
feat(Algebra/Homology/Embedding): the homology of an extension of hom…
b8844c9 
…ological complexes (#19198)

Given an embedding `e : c.Embedding c'`, `K : HomologicalComplex C c`, and degrees such that `e.f j = j'`, we compute the homology of `K.extend e` in degree `j'` in terms of the homology of `K` in degree `j`.
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mathlib-bors bot commented Dec 20, 2024

Build failed (retrying...):

mathlib-bors bot pushed a commit that referenced this pull request Dec 20, 2024
@joelriou
feat(Algebra/Homology/Embedding): the homology of an extension of hom…
4e34721 
…ological complexes (#19198)

Given an embedding `e : c.Embedding c'`, `K : HomologicalComplex C c`, and degrees such that `e.f j = j'`, we compute the homology of `K.extend e` in degree `j'` in terms of the homology of `K` in degree `j`.
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mathlib-bors bot commented Dec 20, 2024

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(Algebra/Homology/Embedding): the homology of an extension of homological complexes [Merged by Bors] - feat(Algebra/Homology/Embedding): the homology of an extension of homological complexes Dec 20, 2024
@mathlib-bors mathlib-bors bot closed this Dec 20, 2024
@mathlib-bors mathlib-bors bot deleted the algebra-homology-embedding-extend-homology branch December 20, 2024 04:44
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