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[Merged by Bors] - feat(CategoryTheory/Bicategory): define adjunctions #6406

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This RP introduces adjunctions and adjoint equivalences in bicategories, and shows that a (non-adjoint) equivalence can be promoted to an adjoint equivalence by upgrading the counit.

The constructor of adjoint equivalences only requires the left triangle identities since I will plan to show that it implies the right triangle identities in a separate PR.


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yuma-mizuno and others added 3 commits August 13, 2023 08:30
Co-authored-by: Johan Commelin <johan@commelin.net>
Co-authored-by: Johan Commelin <johan@commelin.net>
Co-authored-by: Johan Commelin <johan@commelin.net>
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I cannot possibly comment on the tactic code, but otherwise it looks good to me!

Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
Co-authored-by: Joël Riou <37772949+joelriou@users.noreply.github.com>
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bors merge

@github-actions github-actions bot added ready-to-merge This PR has been sent to bors. and removed awaiting-review The author would like community review of the PR labels Aug 18, 2023
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bors bot commented Aug 18, 2023

Merge conflict.

@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot added the merge-conflict The PR has a merge conflict with master, and needs manual merging. label Aug 18, 2023
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bors d+

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bors bot commented Aug 18, 2023

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

@leanprover-community-mathlib4-bot leanprover-community-mathlib4-bot removed the merge-conflict The PR has a merge conflict with master, and needs manual merging. label Aug 18, 2023
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bors r+

bors bot pushed a commit that referenced this pull request Aug 19, 2023
This RP introduces adjunctions and adjoint equivalences in bicategories, and shows that a (non-adjoint) equivalence can be promoted to an adjoint equivalence by upgrading the counit.

The constructor of adjoint equivalences only requires the left triangle identities since I will plan to show that it implies the right triangle identities in a separate PR.
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bors bot commented Aug 19, 2023

Pull request successfully merged into master.

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@bors bors bot changed the title feat(CategoryTheory/Bicategory): define adjunctions [Merged by Bors] - feat(CategoryTheory/Bicategory): define adjunctions Aug 19, 2023
@bors bors bot closed this Aug 19, 2023
@bors bors bot deleted the ymizuno-adjunction-AdjointifyCounit branch August 19, 2023 03:27
mathlib-bors bot pushed a commit that referenced this pull request Nov 9, 2023
mathlib-bors bot pushed a commit that referenced this pull request Nov 9, 2023
grunweg pushed a commit that referenced this pull request Dec 15, 2023
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4 participants