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arXiv · 2610.14282

Example of exponential many collisions of identical hard disks in the plane

Hongda Qiu
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Abstract

We show that the maximal number of nonsimultaneous elastic collisions among $n$ identical hard disks moving freely on the plane is at least exponential in $n$.

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Hongda Qiu. 2026-10-16. Example of exponential many collisions of identical hard disks in the plane. https://arxiv.org/abs/2610.14282

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