Displayed Bicategories #549
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plt-amy
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Aug 20, 2025
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great stuff, here's some formatting nits i noticed on a skim.
(there's a whole lot of "blank lines around code blocks" to point out but i don't want to leave like 50 identical comments. generally every block level element— comments, code, paragraph, lists— needs to be surrounded with blank lines)
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The build seems to have stalled 🤔 |
plt-amy
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Aug 24, 2025
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plt-amy
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Aug 28, 2025
plt-amy
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Sep 1, 2025
| → {A' : Ob[ A ]} {B' : Ob[ B ]} | ||
| → A' [ f ]↦ B' → (f ⇒ g) → A' [ g ]↦ B' | ||
| → Type _ | ||
| _[_]⇒_ {A' = A'} {B' = B'} f' α g' = Hom[ A' , B' ] .Displayed.Hom[_] α f' g' |
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| _[_]⇒_ {A' = A'} {B' = B'} f' α g' = Hom[ A' , B' ] .Displayed.Hom[_] α f' g' | |
| _[_]⇒_ {A' = A'} {B' = B'} f' φ g' = Hom[ A' , B' ] .Displayed.Hom[_] φ f' g' |
maybe?
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Description
This PR defines displayed bicategories, along with some prerequisites like displayed categories of displayed functors.
The prose in the definition of displayed bicategories feels kinda repetitive (whole bunch of "and then we have a displayed version of that"), but I wasn't sure what else to write 😅.
Just a definition for now, some actual theorems about them coming soon.
Checklist
Before submitting a merge request, please check the items below:
support/sort-imports.hs(ornix run --experimental-features nix-command -f . sort-imports).If your change affects many files without adding substantial content, and
you don't want your name to appear on those pages (for example, treewide
refactorings or reformattings), start the commit message and PR title with
chore:.