Rendiconti del Seminario Matematico della Università di Padova

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Volume 120, 2008, pp. 157–166
DOI: 10.4171/RSMUP/120-10

Bar Billiards and Poncelet's Porism

Witold Mozgawa[1]

(1) Uniwersytet Marii Curie-Skłodowskiej, Lublin, Poland

We prove that for a given oval C there exist ovals Cin and Cout, inside and outside of C, such that the pairs (C,Cin) and (Cout,C) satisfy the Poncelet's porism for almost any number of reflections in their bar billiards.

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Mozgawa Witold: Bar Billiards and Poncelet's Porism. Rend. Sem. Mat. Univ. Padova 120 (2008), 157-166. doi: 10.4171/RSMUP/120-10