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Homotopy Type of Intervals of the Second Higher Bruhat Orders

Author(s)
McConville, Thomas
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Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
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Abstract
The higher Bruhat order is a poset generalizing the weak order on permutations. Another special case of this poset is an ordering on simple wiring diagrams. For this case, we prove that every interval is either contractible or homotopy equivalent to a sphere. This partially proves a conjecture due to Reiner. Our proof uses some tools developed by Felsner and Weil to study wiring diagrams. Keywords: Higher Bruhat, Order complex, Mobius function, Wiring diagram, Rhombic tiling
Date issued
2017-12
URI
http://hdl.handle.net/1721.1/119674
Department
Massachusetts Institute of Technology. Department of Mathematics
Journal
Order
Publisher
Springer Netherlands
Citation
McConville, Thomas. “Homotopy Type of Intervals of the Second Higher Bruhat Orders.” Order 35, no. 3 (December 19, 2017): 515–524.
Version: Author's final manuscript
ISSN
0167-8094
1572-9273

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