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Invariants of Self-Intersected and Inversive N-Periodics in the Elliptic Billiard. (arXiv:2011.06640v1 [math.MG]) http://arxiv.org/abs/2011.06640
Invariants of Self-Intersected and Inversive N-Periodics in the Elliptic Billiard. (arXiv:2011.06640v1 [math.MG]) http://arxiv.org/abs/2011.06640