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Cut polytope has vertices on a line (1812.03212v1)
Published 7 Dec 2018 in cs.DM and math.CO
Abstract: The cut polytope ${\rm CUT}(n)$ is the convex hull of the cut vectors in a complete graph with vertex set ${1,\ldots,n}$. It is well known in the area of combinatorial optimization and recently has also been studied in a direct relation with admissible correlations of symmetric Bernoulli random variables. That probabilistic interpretation is a starting point of this work in conjunction with a natural binary encoding of the CUT($n$). We show that for any $n$, with appropriate scaling, all vertices of the polytope ${\mathbf 1}$-CUT($n$) encoded as integers are approximately on the line $y= x-1/2$.