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Jun 9, 2021 at 15:26 answer added Ben Sprott timeline score: 1
S Oct 16, 2018 at 16:00 history bounty ended CommunityBot
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Oct 9, 2018 at 4:25 history edited Ben Sprott CC BY-SA 4.0
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Oct 9, 2018 at 1:15 comment added Ben Sprott If anyone wants to write up an answer, I will award it.
Oct 8, 2018 at 20:44 comment added Robert Furber I think the question is more or less answered by this question: mathoverflow.net/questions/38863/re-seating-a-monad The finite distribution monad (what you call $H$) is a finitary monad, and the category of groupoids is locally finitely presentable, so we can, using the Lawvere theory of $H$, re-seat it onto the category of groupoids in the manner described in the linked question.
Oct 8, 2018 at 20:37 comment added Robert Furber @darijgrinberg These spaces are repeatedly rediscovered under different names, as is the characterization of those that embed in vector spaces by a cancellation property. See the first part of this: arxiv.org/pdf/0903.5522.pdf
Oct 8, 2018 at 18:22 comment added Ben Sprott @darijgrinberg if you have a suggestion for the title, let me know.
Oct 8, 2018 at 17:39 comment added darij grinberg That said, I find the question quite interesting. The algebras for the $H$ monad are something like affine spaces, except that instead of taking arbitrary affine combinations, you can only take convex combinations. So, some sort of abstraction of convexity. Has anyone seen it?
Oct 8, 2018 at 17:33 comment added darij grinberg Algebras don't form the Kleisli category, but form the Eilenberg-Moore category. So the title of this question does not reflect the actual post.
S Oct 8, 2018 at 14:44 history bounty started Ben Sprott
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Oct 6, 2018 at 4:31 history edited Ben Sprott CC BY-SA 4.0
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Oct 6, 2018 at 3:10 history asked Ben Sprott CC BY-SA 4.0