Timeline for Why do wedges of spheres often appear in combinatorics?
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| Jun 21, 2021 at 1:14 | comment | added | Sam Hopkins | Adding to the comment of @RichardStanley, natural examples of (simplicial complexes homotopy equivalent to) wedges of spheres of different dimensions in combinatorics are matching complexes of grid graphs: see arxiv.org/abs/1812.11000 and arxiv.org/abs/2106.09915. | |
| Mar 7, 2010 at 16:46 | comment | added | Richard Stanley | Wedges of spheres of different dimensions do appear naturally in combinatorics in connection with nonpure shellability and the sequential Cohen-Macaulay property. See for instance math.miami.edu/~wachs/papers/nonpure1.pdf, math.miami.edu/~wachs/papers/nonpure2.pdf, math.miami.edu/~wachs/papers/scm.pdf. | |
| Mar 7, 2010 at 16:12 | history | answered | Allen Hatcher | CC BY-SA 2.5 |