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nLab > Latest Changes: Rel

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1 to 6 of 6

  1.  
    • CommentRowNumber1.
    • CommentAuthorJohn Baez
    • CommentTimeSep 3rd 2018

    I added some material about monads and adjunctions in the 2-category Rel and decided to distinguish this 2-category from the 1-category of relations, hoping this will make it a bit easier to state lots of results about both without getting mixed up.

    diff, v23, current

    • CommentRowNumber2.
    • CommentAuthorMike Shulman
    • CommentTimeSep 4th 2018

    Good idea, thanks.

    • CommentRowNumber3.
    • CommentAuthorvarkor
    • CommentTimeOct 5th 2022

    Mentioned relations in a category with a suitable factorisation system.

    diff, v28, current

  4. Adding pointer to

    Andre Kornell, Axioms for the category of sets and relations (arXiv:2302.14153)

    Katherine

    diff, v29, current

    • CommentRowNumber5.
    • CommentAuthorvarkor
    • CommentTimeJan 30th 2024

    Added a reference, “Bicategories of spans and relations”.

    diff, v31, current

    • CommentRowNumber6.
    • CommentAuthormattecapu
    • CommentTimeSep 5th 2024

    clarify that Span->Rel is in fact a pseudofunctor

    diff, v32, current

1 to 6 of 6

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