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[Merged by Bors] - feat(Algebra/Homology/SpectralObject): cycles as cokernels and opcycles as kernels#35361

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[Merged by Bors] - feat(Algebra/Homology/SpectralObject): cycles as cokernels and opcycles as kernels#35361
joelriou wants to merge 19 commits intoleanprover-community:masterfrom
joelriou:spectral-sequences-2-cycles-2

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@joelriou joelriou commented Feb 15, 2026

@joelriou joelriou added WIP Work in progress t-category-theory Category theory labels Feb 15, 2026
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github-actions bot commented Feb 15, 2026

PR summary 32af1e5dd5

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ H_map_twoδ₂Toδ₁_toCycles
+ cokernelIsoCycles
+ cokernelIsoCycles_hom_fac
+ cokernelSequenceCycles
+ cokernelSequenceCycles_exact
+ descCycles
+ fromOpcycles
+ fromOpcycles_H_map_twoδ₁Toδ₀
+ fromOpcyles_δ
+ instance (n : ℤ) : Epi (X.cokernelSequenceCycles f g fg h n).g := by
+ instance (n : ℤ) : Epi (X.toCycles f g fg h n)
+ instance (n : ℤ) : Mono (X.fromOpcycles f g fg h n)
+ instance (n : ℤ) : Mono (X.kernelSequenceOpcycles f g fg h n).f := by
+ isIso_fromOpcycles
+ isIso_toCycles
+ kernelSequenceOpcycles
+ kernelSequenceOpcycles_exact
+ liftOpcycles
+ liftOpcycles_fromOpcycles
+ opcyclesIsoKernel
+ opcyclesIsoKernel_hom_fac
+ opcyclesMap_fromOpcycles
+ pOpcycles_δFromOpcycles
+ p_fromOpcycles
+ toCycles
+ toCycles_cyclesMap
+ toCycles_descCycles
+ toCycles_i
+ δFromOpcycles
+ δToCycles
+ δToCycles_iCycles
+ δ_toCycles

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

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

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


Increase in tech debt: (relative, absolute) = (2.00, 0.00)
Current number Change Type
9977 2 backward.isDefEq

Current commit fa567c06e6
Reference commit 32af1e5dd5

You can run this locally as

./scripts/reporting/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).

@github-actions github-actions bot added the t-algebra Algebra (groups, rings, fields, etc) label Feb 15, 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 Feb 15, 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 Feb 25, 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 Feb 28, 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 Mar 3, 2026
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Thanks 🎉

bors merge

@mathlib-triage mathlib-triage bot added the ready-to-merge This PR has been sent to bors. label Mar 3, 2026
mathlib-bors bot pushed a commit that referenced this pull request Mar 3, 2026
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mathlib-bors bot commented Mar 3, 2026

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(Algebra/Homology/SpectralObject): cycles as cokernels and opcycles as kernels [Merged by Bors] - feat(Algebra/Homology/SpectralObject): cycles as cokernels and opcycles as kernels Mar 3, 2026
@mathlib-bors mathlib-bors bot closed this Mar 3, 2026
xroblot pushed a commit to xroblot/mathlib4 that referenced this pull request Mar 10, 2026
pevogam pushed a commit to pevogam/mathlib4 that referenced this pull request Mar 19, 2026
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