Perfect prismatoids are lattice Delaunay polytopes

Abstract

A perfect prismatoid is a convex polytope $P$ such that for every its facet $F$ the set $vert(P)\setminus vert(F)$ belongs to a supporting hyperplane $\alpha \parallel F$. We prove that every perfect prismatoid is affinely equivalent to some $0/1$-polytope of the same dimension. (And therefore every perfect prismatoid is a lattice polytope.) Moreover, we prove that every perfect prismatoid is a lattice Delaunay polytope.

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