Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

[Merged by Bors] - feat(category_theory/abelian): abelian categories with enough projectives have projective resolutions #7488

Closed
wants to merge 159 commits into from
Closed

[Merged by Bors] - feat(category_theory/abelian): abelian categories with enough projectives have projective resolutions #7488

wants to merge 159 commits into from

Conversation

semorrison
Copy link
Collaborator

@semorrison semorrison commented May 4, 2021 •
edited by github-actions bot

semorrison and others added 30 commits May 4, 2021 19:55
@semorrison
feat(category_theory/.../images): image.pre_comp_epi_of_epi
ce8b14e
@semorrison
feat(category_theory/.../zero): if a zero morphism is a mono, the sou…
2ab67aa 
…rce is zero
@semorrison
add simp lemmas
dc8ac57
@semorrison
feat(category_theory/.../additive_functor): additive functors preserv…
410a946 
…e zero objects
@semorrison
feat(category_theory/preadditive): reformulation of mono_of_kernel_zero
25a6827
@semorrison
feat(category_theory/quotient): the quotient functor is full and esse…
7e13d1b 
…ntially surjective
@semorrison
feat(category_theory/subobject): minor tweaks
6fa9bfe
@semorrison
Merge branch 'subobject2' into subobject_limits
62850b8
@semorrison
feat(category_theory/subobjects): more about kernel and image subobjects
d6169aa
@semorrison
minor
3caf09d
@semorrison
Merge branch 'subobject_limits' into homology_redesign
292109b
@semorrison
Merge branch 'subobject2' into subobject_limits
79e72a0
@semorrison
Merge branch 'subobject_limits' into homology_redesign
01f2cc4
@semorrison
Merge branch 'mono_of_kernel_iso_zero' into homology_redesign
723796d
@semorrison
Merge branch 'zero' into homology_redesign
a4635dc
@semorrison
feat(algebra/homology): redesign of homological complexes
b9c853b
@semorrison
feat(algebra/homology/single): chain complexes supported in a single …
5feee94 
…degree
@semorrison
oops
bc59d44
@semorrison
Merge branch 'homology_redesign' into homology_single
7e30250
@semorrison
feat(algebra/homology): chain complexes are an additive category
5f441a0
@semorrison
Merge branch 'functor.map_zero_object' into homology_additive
f2c531f
@semorrison
feat(algebra/homology): truncation and augmentation of chain complexes
f203e6d
@semorrison
feat(algebra/homology): homotopies between chain maps
10b42c1
@semorrison
Merge branch 'quotient_functor' into homotopy_category
f1ebd3c
@semorrison
feat(algebra/homology): the homotopy category
08065fd
@jcommelin
Update src/category_theory/quotient.lean
76676a9
@semorrison
feat(category_theory/*/projective): refactor treatment of projective …
f2be42d 
…objects
@semorrison
Merge branch 'homotopy_category' into projective_resolution3
a0a456b
@semorrison
feat(algebra/homology): projective resolutions
dac539f
@semorrison
Merge branch 'homology_augment' into abelian_projective
1cf546a
@github-actions github-actions bot added merge-conflict Please `git merge origin/master` then a bot will remove this label. and removed merge-conflict Please `git merge origin/master` then a bot will remove this label. labels May 18, 2021
@github-actions github-actions bot removed the merge-conflict Please `git merge origin/master` then a bot will remove this label. label May 20, 2021
@semorrison semorrison added the awaiting-review The author would like community review of the PR label May 20, 2021
@github-actions github-actions bot added merge-conflict Please `git merge origin/master` then a bot will remove this label. and removed blocked-by-other-PR This PR depends on another PR which is still in the queue. A bot manages this label via PR comment. labels May 31, 2021
@github-actions
Copy link

🎉 Great news! Looks like all the dependencies have been resolved:

💡 To add or remove a dependency please update this issue/PR description.

Brought to you by Dependent Issues (:robot: ). Happy coding!

@github-actions github-actions bot removed the merge-conflict Please `git merge origin/master` then a bot will remove this label. label May 31, 2021
jcommelin
jcommelin approved these changes Jun 1, 2021
View reviewed changes
Copy link
Member

@jcommelin jcommelin left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Thanks 🎉

bors merge

@github-actions github-actions bot added ready-to-merge All that is left is for bors to build and merge this PR. (Remember you need to say `bors r+`.) and removed awaiting-review The author would like community review of the PR labels Jun 1, 2021
@bors
Copy link

bors bot commented Jun 1, 2021

Canceled.

@semorrison
Copy link
Collaborator Author

@jcommelin, sorry, that doc-string I added wasn't intended to be the entire explanation: I should have left a comment that more was coming.

In fact, the more that came was a complete rewrite, that doesn't jump through any strange hoops at all. We just use chain_complex.mk' and chain_complex.mk_hom in the completely standard way, hooray!

Could you please re-review?

@semorrison semorrison requested a review from jcommelin June 1, 2021 06:16
jcommelin
jcommelin reviewed Jun 1, 2021
View reviewed changes
Copy link
Member

@jcommelin jcommelin left a comment

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Wow! That looks much much better!

@jcommelin
Copy link
Member

bors d+

@bors
Copy link

bors bot commented Jun 1, 2021

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

@github-actions github-actions bot added the delegated The PR author may merge after reviewing final suggestions. label Jun 1, 2021
@semorrison
Copy link
Collaborator Author

bors merge

bors bot pushed a commit that referenced this pull request Jun 1, 2021
@semorrison @jcommelin
feat(category_theory/abelian): abelian categories with enough project…
2689c51 
…ives have projective resolutions (#7488)




Co-authored-by: Scott Morrison <scott.morrison@gmail.com>
Co-authored-by: Johan Commelin <johan@commelin.net>
@bors
Copy link

bors bot commented Jun 2, 2021

Pull request successfully merged into master.

Build succeeded:

@bors bors bot changed the title feat(category_theory/abelian): abelian categories with enough projectives have projective resolutions [Merged by Bors] - feat(category_theory/abelian): abelian categories with enough projectives have projective resolutions Jun 2, 2021
@bors bors bot closed this Jun 2, 2021
@bors bors bot deleted the abelian_projective branch June 2, 2021 04:56
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Reviewers

@jcommelin jcommelin jcommelin approved these changes

Assignees
No one assigned
Labels
delegated The PR author may merge after reviewing final suggestions. ready-to-merge All that is left is for bors to build and merge this PR. (Remember you need to say `bors r+`.)
Projects
None yet
Milestone
No milestone
Development

Successfully merging this pull request may close these issues.

None yet
4 participants
@semorrison @jcommelin @dwarn @adamtopaz