Free categories, categories from generators and relations #422
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plt-amy
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Sep 23, 2024
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Description
This PR proves that free categories are, in fact, free. It also proves that we can construct categories via generators and relations in the style of Borceux 5.1.6, and shows that these categories are also a free construction. I've also factored out the definition of graphs into its own file.
This closes 5.1.2, 5.1.5, and 5.1.6 of Borceux.
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:.