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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeNov 15th 2011
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded to [[Stiefel-Whitney class]] briefly the definition/characterization.

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

2. • CommentRowNumber2.
   • CommentAuthorjim_stasheff
   • CommentTimeNov 15th 2011
   • PermaLink
   Author: jim_stasheff
   Format: TextYou might want to add to your references an obvious one(which I am too modest to name !) listed in the wiki

   You might want to add to your references an obvious one(which I am too modest to name !) listed in the wiki
3. • CommentRowNumber3.
   • CommentAuthorTodd_Trimble
   • CommentTimeNov 15th 2011
   • PermaLink
   Author: Todd_Trimble
   Format: MarkdownItexJim: done.

   Jim: done.

4. • CommentRowNumber4.
   • CommentAuthorDavidRoberts
   • CommentTimeNov 16th 2011
   • PermaLink
   Author: DavidRoberts
   Format: MarkdownItexNice one, Jim.

   Nice one, Jim.

5. • CommentRowNumber5.
   • CommentAuthorUrs
   • CommentTimeNov 16th 2011
   • PermaLink
   Author: Urs
   Format: MarkdownItexSorry 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 $n$Lab you may be non-modest, if only it helps spread useful information.

   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 $n$Lab you may be non-modest, if only it helps spread useful information.

6. • CommentRowNumber6.
   • CommentAuthorTobyBartels
   • CommentTimeNov 16th 2011
   • PermaLink
   Author: TobyBartels
   Format: MarkdownItexYes, the nLab is *our* lab notebook, and we may wish to make note of where *our* papers are relevant to material in *our* notebook.

   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.

7. • CommentRowNumber7.
   • CommentAuthornLab edit announcer
   • CommentTimeNov 5th 2022
   • PermaLink
   Author: nLab edit announcer
   Format: MarkdownItexstriucture->structure Anonymous <a href="https://ncatlab.org/nlab/revision/diff/Stiefel-Whitney+class/18">diff</a>, <a href="https://ncatlab.org/nlab/revision/Stiefel-Whitney+class/18">v18</a>, <a href="https://ncatlab.org/nlab/show/Stiefel-Whitney+class">current</a>

   striucture->structure

   Anonymous

   diff, v18, current

8. • CommentRowNumber8.
   • CommentAuthorSamuel Adrian Antz
   • CommentTimeFeb 18th 2024
   • (edited Feb 18th 2024)
   • PermaLink
   Author: Samuel Adrian Antz
   Format: MarkdownItexAdded reference to Stiefel-Whitney classes generating the cohomology ring of $B O(n)$. <a href="https://ncatlab.org/nlab/revision/diff/Stiefel-Whitney+class/19">diff</a>, <a href="https://ncatlab.org/nlab/revision/Stiefel-Whitney+class/19">v19</a>, <a href="https://ncatlab.org/nlab/show/Stiefel-Whitney+class">current</a>

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

   diff, v19, current

9. • CommentRowNumber9.
   • CommentAuthorSamuel Adrian Antz
   • CommentTimeFeb 18th 2024
   • PermaLink
   Author: Samuel Adrian Antz
   Format: MarkdownItexAdded cohomology ring of $B S O(n)$ with reference. <a href="https://ncatlab.org/nlab/revision/diff/Stiefel-Whitney+class/20">diff</a>, <a href="https://ncatlab.org/nlab/revision/Stiefel-Whitney+class/20">v20</a>, <a href="https://ncatlab.org/nlab/show/Stiefel-Whitney+class">current</a>

   Added cohomology ring of $B S O(n)$ with reference.

   diff, v20, current

10. • CommentRowNumber10.
    • CommentAuthorUrs
    • CommentTimeFeb 19th 2024
    • (edited Feb 19th 2024)
    • PermaLink
    Author: Urs
    Format: MarkdownItexI have added a few more words (*[[classifying space]]*, *[[ordinary cohomology]]*, *[[orthogonal group]]*). <a href="https://ncatlab.org/nlab/revision/diff/Stiefel-Whitney+class/21">diff</a>, <a href="https://ncatlab.org/nlab/revision/Stiefel-Whitney+class/21">v21</a>, <a href="https://ncatlab.org/nlab/show/Stiefel-Whitney+class">current</a>

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

    diff, v21, current

11. • CommentRowNumber11.
    • CommentAuthorSamuel Adrian Antz
    • CommentTimeFeb 19th 2024
    • PermaLink
    Author: Samuel Adrian Antz
    Format: MarkdownItexAs there are currently none, I'd like to create own pages for $B O(n)$, $B S O(n)$, $B U(n)$ and $B S U(n)$. (I already wrote the german Wikipedia pages for $B O(n)$ and $B U(n)$ last year.) What title should I use, for example for the page of $B O(n)$? 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]]?)

    As there are currently none, I’d like to create own pages for $B O(n)$, $B S O(n)$, $B U(n)$ and $B S U(n)$. (I already wrote the german Wikipedia pages for $B O(n)$ and $B U(n)$ last year.) What title should I use, for example for the page of $B O(n)$? 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?)

12. • CommentRowNumber12.
    • CommentAuthorUrs
    • CommentTimeFeb 19th 2024
    • PermaLink
    Author: Urs
    Format: MarkdownItexSounds good. Sure, *[[BO(n)]]* would work as a title, the other options as redirects.

    Sounds good.

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