Skip to content

[Merged by Bors] - feat(CategoryTheory/Sites): homotopy equivalent hypercovers have equivalent sheaf conditions#35902

Closed
chrisflav wants to merge 4 commits intoleanprover-community:masterfrom
chrisflav:homotopy-exact-iff
Closed

[Merged by Bors] - feat(CategoryTheory/Sites): homotopy equivalent hypercovers have equivalent sheaf conditions#35902
chrisflav wants to merge 4 commits intoleanprover-community:masterfrom
chrisflav:homotopy-exact-iff

Conversation

@chrisflav
Copy link
Member

If E and F are homotopy equivalent pre-1-hypercovers, then the multifork associated to E is exact if and only if the multifork associated to F is exact.


Open in Gitpod

@chrisflav chrisflav added the t-category-theory Category theory label Feb 28, 2026
@github-actions
Copy link

github-actions bot commented Feb 28, 2026

PR summary b9242563f9

Import changes for modified files

No significant changes to the import graph

Import changes for all files
Files Import difference

Declarations diff

+ Homotopy.isLimitMultifork
+ Homotopy.isLimitMultiforkEquiv

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) = (1.00, 0.00)
Current number Change Type
9986 1 backward.isDefEq

Current commit 8d2551674d
Reference commit b9242563f9

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).

@joelriou
Copy link
Contributor

joelriou commented Mar 3, 2026

Thanks!

bors d+

@mathlib-bors
Copy link
Contributor

mathlib-bors bot commented Mar 3, 2026

✌️ chrisflav 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 the delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). label Mar 3, 2026
Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
@chrisflav
Copy link
Member Author

Thanks!
bors r+

mathlib-bors bot pushed a commit that referenced this pull request Mar 3, 2026
…valent sheaf conditions (#35902)

If `E` and `F` are homotopy equivalent pre-`1`-hypercovers, then the multifork associated to `E` is exact if and only if the multifork associated to `F` is exact.
@mathlib-bors
Copy link
Contributor

mathlib-bors bot commented Mar 3, 2026

Build failed:

@chrisflav
Copy link
Member Author

bors r+

mathlib-bors bot pushed a commit that referenced this pull request Mar 3, 2026
…valent sheaf conditions (#35902)

If `E` and `F` are homotopy equivalent pre-`1`-hypercovers, then the multifork associated to `E` is exact if and only if the multifork associated to `F` is exact.
@mathlib-bors
Copy link
Contributor

mathlib-bors bot commented Mar 3, 2026

Pull request successfully merged into master.

Build succeeded:

@mathlib-bors mathlib-bors bot changed the title feat(CategoryTheory/Sites): homotopy equivalent hypercovers have equivalent sheaf conditions [Merged by Bors] - feat(CategoryTheory/Sites): homotopy equivalent hypercovers have equivalent sheaf conditions 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
…valent sheaf conditions (leanprover-community#35902)

If `E` and `F` are homotopy equivalent pre-`1`-hypercovers, then the multifork associated to `E` is exact if and only if the multifork associated to `F` is exact.
pevogam pushed a commit to pevogam/mathlib4 that referenced this pull request Mar 19, 2026
…valent sheaf conditions (leanprover-community#35902)

If `E` and `F` are homotopy equivalent pre-`1`-hypercovers, then the multifork associated to `E` is exact if and only if the multifork associated to `F` is exact.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment

Labels

delegated This pull request has been delegated to the PR author (or occasionally another non-maintainer). t-category-theory Category theory

Projects

None yet

Development

Successfully merging this pull request may close these issues.

2 participants