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    • CommentRowNumber1.
    • CommentAuthorUrs
    • CommentTimeNov 15th 2011

    added to Stiefel-Whitney class briefly the definition/characterization.

    • CommentRowNumber2.
    • CommentAuthorjim_stasheff
    • CommentTimeNov 15th 2011
    You might want to add to your references an obvious one(which I am too modest to name !) listed in the wiki
    • CommentRowNumber3.
    • CommentAuthorTodd_Trimble
    • CommentTimeNov 15th 2011

    Jim: done.

    • CommentRowNumber4.
    • CommentAuthorDavidRoberts
    • CommentTimeNov 16th 2011

    Nice one, Jim.

    • CommentRowNumber5.
    • CommentAuthorUrs
    • CommentTimeNov 16th 2011

    Sorry for not having added the link earlier. I did have it at characteristic class and Pontryagin class, now I copied it over to Chern class, too.

    If you see it missing elsewhere, please just add it. As opposed to Wikipedia, on the nLab you may be non-modest, if only it helps spread useful information.

    • CommentRowNumber6.
    • CommentAuthorTobyBartels
    • CommentTimeNov 16th 2011

    Yes, the nLab is our lab notebook, and we may wish to make note of where our papers are relevant to material in our notebook.

  1. striucture->structure

    Anonymous

    diff, v18, current

    • CommentRowNumber8.
    • CommentAuthorSamuel Adrian Antz
    • CommentTimeFeb 18th 2024
    • (edited Feb 18th 2024)

    Added reference to Stiefel-Whitney classes generating the cohomology ring of BO(n).

    diff, v19, current

  2. Added cohomology ring of BSO(n) with reference.

    diff, v20, current

    • CommentRowNumber10.
    • CommentAuthorUrs
    • CommentTimeFeb 19th 2024
    • (edited Feb 19th 2024)

    I have added a few more words (classifying space, ordinary cohomology, orthogonal group).

    diff, v21, current

  3. As there are currently none, I’d like to create own pages for BO(n), BSO(n), BU(n) and BSU(n). (I already wrote the german Wikipedia pages for BO(n) and BU(n) last year.) What title should I use, for example for the page of BO(n)? Simply “BO(n)” (like for example MO), “classifying space of O(n)” or “classifying space of orthogonal group”? (Or is there a particular reason for why most about them is all in classifying space?)

    • CommentRowNumber12.
    • CommentAuthorUrs
    • CommentTimeFeb 19th 2024

    Sounds good.

    Sure, BO(n) would work as a title, the other options as redirects.