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Implement IsPullback suggestions #431

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merged 5 commits into from
Sep 18, 2024
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jacquescomeaux
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@jacquescomeaux jacquescomeaux commented Aug 6, 2024

This pull request is intended to address issue #334.

Tasks:

  • Move unique field to bottom
  • Replace unique with unique-diagram
  • Reconsider naming

Switched the places of unique and unique-diagram for both pullbacks and
pushouts; unique is now derived from unique-diagram.
@jacquescomeaux jacquescomeaux marked this pull request as draft August 6, 2024 18:45
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@JacquesCarette JacquesCarette left a comment

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Coming along nicely - a few comments on the current state.

; p₁∘universal≈h₁ = X.refl
; p₂∘universal≈h₂ = Y.refl
; unique-diagram = λ eq₁ eq₂ → eq₁ , eq₂
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would _,_ do?

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@jacquescomeaux jacquescomeaux Aug 9, 2024

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It doesn't seem like that will work, because there is an implicit argument after eq₂

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What about naming? Is unique-diagram the right name for the property now included as a record field?

@jacquescomeaux jacquescomeaux marked this pull request as ready for review August 18, 2024 18:46
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Thanks for the updates (and sorry on my slowness!). On name: unique-diagram seems super generic (as was unique...) but if we're going to change it, then maybe unique-pb-square would be more indicative?

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I don't really think the name needs to change. I just wanted to make sure there wasn't an obviously-better alternative before I consider the PR done.

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Sure, we can go with that and see if people complain.

@JacquesCarette JacquesCarette merged commit 9d27c77 into agda:master Sep 18, 2024
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2 participants