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Search options questions only not deleted user 756
5 votes
2 answers
733 views

In what sense do the categorical trace and coend count fixed points?

According to the nlab, the categorical trace of a 1-endomorphism $F:C\to C$ in a 2-category is the set hom$(1_C, F)$ of global elements of $F$. If $F$ is a functor in the 2-category Cat, the categori …
Mike Stay's user avatar
  • 1,532
2 votes
1 answer
299 views

References to using profunctors in program analysis?

Profunctors from a category to itself seem like they'd be useful in representing the result of a program analysis; I can imagine a profunctor that given some information about a function it tells you what …
Mike Stay's user avatar
  • 1,532