[Merged by Bors] - feat(CategoryTheory/Sites): reflecting and preserving local injectivity and surjectivity#13621
Closed
dagurtomas wants to merge 4 commits intomasterfrom
Closed
[Merged by Bors] - feat(CategoryTheory/Sites): reflecting and preserving local injectivity and surjectivity#13621dagurtomas wants to merge 4 commits intomasterfrom
dagurtomas wants to merge 4 commits intomasterfrom
Conversation
…ty and surjectivity
PR summaryImport changesNo significant changes to the import graph
|
joelriou
reviewed
Jun 8, 2024
joelriou
reviewed
Jun 8, 2024
1 task
Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
Contributor
|
Thanks! bors merge |
mathlib-bors bot
pushed a commit
that referenced
this pull request
Jun 8, 2024
…ty and surjectivity (#13621) This PR proves that precomposition with a cocontinuous functor preserves local injectivity and surjectivity of morphisms of presheaves, and that precomposition with a cover preserving and cover dense functor reflects the same properties.
Contributor
|
Pull request successfully merged into master. Build succeeded: |
AntoineChambert-Loir
pushed a commit
that referenced
this pull request
Jun 20, 2024
…ty and surjectivity (#13621) This PR proves that precomposition with a cocontinuous functor preserves local injectivity and surjectivity of morphisms of presheaves, and that precomposition with a cover preserving and cover dense functor reflects the same properties.
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
This PR proves that precomposition with a cocontinuous functor preserves local injectivity and surjectivity of morphisms of presheaves, and that precomposition with a cover preserving and cover dense functor reflects the same properties.