Timeline for List of Classifying Spaces and Covers
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
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| Nov 11, 2014 at 19:37 | history | edited | Steven Sam | CC BY-SA 3.0 |
fixed latex error
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| Mar 6, 2012 at 23:02 | comment | added | Ryan Budney | Similarly to Neil's $B\Sigma_n$ model, you can view $BA_n$ as the collection of all subsets of $\mathbb R^\infty$ which span an affine $(n-1)$-dimensional subspace, and where the subspace is equipped with an orientation. This is a model Dev Sinha mentions in some of his talks. | |
| Jan 1, 2012 at 8:32 | history | made wiki | Post Made Community Wiki by S. Carnahan♦ | ||
| Feb 24, 2011 at 7:47 | comment | added | Chris Brav | To add to Mariano's comment, there is a nice story for a kind of generalized braid group associated to a Weyl group (in the same way that Artin's braid group is associated to the symmetric group). Again, the classifying space can be represented as a quotient of a hyperplane complement. See papers of Brieskorn-Saito and Deligne from the early 70s. | |
| Feb 23, 2011 at 18:24 | comment | added | Mariano Suárez-Álvarez | By writing the elements of $BH_n$ as $n$-tuples of distinct points of $R^2$, so in particular, elements of $\mathbb{R}^{2n}$, you can view it as the complement of a subspace arrangement. &c. | |
| Feb 23, 2011 at 10:15 | history | edited | Neil Strickland | CC BY-SA 2.5 |
Reformat, second example.; added 8 characters in body
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| Feb 23, 2011 at 8:50 | history | answered | Neil Strickland | CC BY-SA 2.5 |