Post #3023656
2026-05-12 18:43 UTC
@BartoszMilewski@mathstodon.xyz
That still doesn't seem right though. In the diagram, P,Q,R, and S are the profunctors. and they look vertical to me, whether drawn as a string diagram or it's Poincaré dual 🤔
Replies (1)
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@BartoszMilewski@mathstodon.xyz 2026-05-12 18:50
@6d03@mathstodon.xyz For me they're horizontal lines, although they connect two areas that are on top of each other, so I see your point. I've been following the conventions of David Jaz Myers. https://arxiv.org/abs/1612.02762