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    • CommentRowNumber1.
    • CommentAuthorTodd_Trimble
    • CommentTimeNov 26th 2010

    I added a bit to the section on the ultrafilter monad in ultrafilter. This could stand to be fleshed out still more. The immediate reason for my editing here was to put down the notion of “compact Hausdorff object” (which is used in a remark at BoolAlg).

    • CommentRowNumber2.
    • CommentAuthorTobyBartels
    • CommentTimeNov 27th 2010


    It works better to link to compact Hausdorff object and then put a redirect from that to ultrafilter than to link to ultrafilter while saying ’compact Hausdorff object’. Someday, there might be a separate page compact Hausdorff object, and we want the links to continue to the right place.

    • CommentRowNumber3.
    • CommentAuthorDmitri Pavlov
    • CommentTimeAug 28th 2018

    Added a new section about Garner’s theorem on ultrafilters as presheaves.

    diff, v37, current

  1. Hi Dmitri, if you like, feel free to leave the citation syntax like you have it. I can try to implement it in the course of the next few days.

    • CommentRowNumber5.
    • CommentAuthorDavid_Corfield
    • CommentTimeJul 1st 2020

    Added the definition of the Blass category of ultrafilters.

    diff, v41, current

    • CommentRowNumber6.
    • CommentAuthorDavid_Corfield
    • CommentTimeJan 3rd 2021

    The link to Lawvere’s post to the categories list is dead, so I added

    I imagine this is a problem for all references to the list. I’ve left the original link in case there’s a global replacement solution, rather than one-by-one changes to the relevant monthly folder.

    diff, v42, current

    • CommentRowNumber7.
    • CommentAuthorDavidRoberts
    • CommentTimeJan 3rd 2021

    Anything linking to the period after the curated archives is not available, except through the efforts of some people who now have the entire list extracted and stored on GitHub, but not in a use-friendly format.