UW Combinatorics Talk
Blending polytopes at simple faces
Fred Holt
University of Washington
October 29, 4:00pm
Padelford C-401
refreshments at 3:30pm
Pre-Seminar at 2:30pm in Padelford C-036
ABSTRACT
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Blending two simple polytopes together at vertices, at edges, or at other supplementary faces, produces another simple polytope. In pursuing the Hirsch conjectures, vertex-blends produced polytopes which have large diameter and few diametral paths. Here we define and explore blends at higher-dimensional faces. We identify specific blendings which would, given the proper inputs, produce counterexamples to the Hirsch conjecture. We also show that the Hirsch conjecture is sharp for dimension 7.
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Speaker's Contact Info:
http://staff.washington.edu/fbholt
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