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Open AccessArticle

The Roundest Polyhedra with Symmetry Constraints

Department of Structural Mechanics, Budapest University of Technology and Economics, H-1111 Budapest, Hungary
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Symmetry 2017, 9(3), 41;
Received: 5 December 2016 / Revised: 3 March 2017 / Accepted: 8 March 2017 / Published: 15 March 2017
(This article belongs to the Special Issue Polyhedral Structures)
Amongst the convex polyhedra with n faces circumscribed about the unit sphere, which has the minimum surface area? This is the isoperimetric problem in discrete geometry which is addressed in this study. The solution of this problem represents the closest approximation of the sphere, i.e., the roundest polyhedra. A new numerical optimization method developed previously by the authors has been applied to optimize polyhedra to best approximate a sphere if tetrahedral, octahedral, or icosahedral symmetry constraints are applied. In addition to evidence provided for various cases of face numbers, potentially optimal polyhedra are also shown for n up to 132. View Full-Text
Keywords: polyhedra; isoperimetric problem; point group symmetry polyhedra; isoperimetric problem; point group symmetry
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MDPI and ACS Style

Lengyel, A.; Gáspár, Z.; Tarnai, T. The Roundest Polyhedra with Symmetry Constraints. Symmetry 2017, 9, 41.

AMA Style

Lengyel A, Gáspár Z, Tarnai T. The Roundest Polyhedra with Symmetry Constraints. Symmetry. 2017; 9(3):41.

Chicago/Turabian Style

Lengyel, András; Gáspár, Zsolt; Tarnai, Tibor. 2017. "The Roundest Polyhedra with Symmetry Constraints" Symmetry 9, no. 3: 41.

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