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An improved upper bound on the number of billiard ball collisions

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arxiv 2107.10362 v2 pith:Q2ILGCCX submitted 2021-07-21 math.DS

An improved upper bound on the number of billiard ball collisions

classification math.DS
keywords boundcollisionsequalnumberupperballbilliardelastic
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We give a new upper bound $K_+$ on the number of totally elastic collisions of $n$ hard spheres with equal radii and equal masses in $R^d$. Our bound satisfies $\log K_+ \leq c(d) n \log n$.

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