A generalization of a theorem of G. K. White

Details A generalization of a theorem of G. K. White A generalization of a theorem of G. K. White

2010-04-20

arxiv.org/abs/1004.3411v1

Mathematics

Combinatorics

12 pages, 2 figures

Scientific paper

An n-dimensional simplex \Delta in \R^n is called empty lattice simplex if \Delta \cap\Z^n is exactly the set of vertices of \Delta . A theorem of G. K. White shows that if n=3 then any empty lattice simplex \Delta \subset\R^3 is isomorphic up to an unimodular affine linear transformation to a lattice tetrahedron whose all vertices have third coordinate 0 or 1. In this paper we prove a generalization of this theorem for an arbitrary odd dimension n=2d-1 which in some form was conjectured by Seb\H{o} and Borisov. This result implies a classification of all 2d-dimensional isolated Gorenstein cyclic quotient singularities with minimal log-discrepancy at least d.

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