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nLab > Latest Changes: quintets

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  1.  
    • CommentRowNumber1.
    • CommentAuthorMike Shulman
    • CommentTimeApr 25th 2016
    • CommentRowNumber2.
    • CommentAuthorTodd_Trimble
    • CommentTimeApr 25th 2016

    These are interesting additions you’ve been making! I see no references in quintet; does this mean this notion is a recent invention of yours?

    • CommentRowNumber3.
    • CommentAuthorRichard Williamson
    • CommentTimeApr 25th 2016
    • (edited Apr 25th 2016)

    I believe that it in fact goes back to Ehresmann.

    • CommentRowNumber4.
    • CommentAuthorUrs
    • CommentTimeApr 25th 2016
    • (edited Apr 26th 2016)

    Yes, the concept is due to pages 272-273 of

    • A Bastiani, C Ehresmann, “Multiple functors. I. Limits relative to double categories”, Cah. Top. G´eom. Diff´er. Cat´eg. 15 (1974) 215–292
    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeApr 26th 2016

    I have added the original reference to the entry (here).

    • CommentRowNumber6.
    • CommentAuthorMike Shulman
    • CommentTimeApr 26th 2016

    Thanks.

1 to 6 of 6

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