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A Class of Cellulated Spheres with Non-Polytopal Symmetries

Published online by Cambridge University Press:  20 November 2018

Gábor Gévay
Gábor Gévay*
Affiliation:
Bolyai Institute, University of Szeged, Aradi vértanúk tere 1, H-6720 Szeged, Hungary e-mail: [email protected]
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Abstract

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We construct, for all $d\,\ge \,4$, a cellulation of ${{\mathbb{S}}^{d-1}}$. We prove that these cellulations cannot be polytopal with maximal combinatorial symmetry. Such non-realizability phenomenon was first described in dimension 4 by Bokowski, Ewald and Kleinschmidt, and, to the knowledge of the author, until now there have not been any known examples in higher dimensions. As a starting point for the construction, we introduce a new class of (Wythoffian) uniform polytopes, which we call duplexes. In proving our main result, we use some tools that we developed earlier while studying perfect polytopes. In particular, we prove perfectness of the duplexes; furthermore, we prove and make use of the perfectness of another new class of polytopes which we obtain by a variant of the so-called $E$-construction introduced by Eppstein, Kuperberg and Ziegler.

Keywords

52B1152B1552B70CW spherepolytopalityautomorphism groupsymmetry groupuniform polytope
Type
Research Article
Information
Canadian Mathematical Bulletin , Volume 52 , Issue 3 , 01 September 2009 , pp. 366 - 379
Copyright
Copyright © Canadian Mathematical Society 2009

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