Abstract
We study the orbits of the dual billiard map about a polygonal table using the technique of necklace dynamics. Our main result is that for a certain class of tables, called the quasi-rational polygons, the dual billiard orbits are bounded. This implies that for the subset of rational tables (i.e. polygons with rational vertices) the dual billiard orbits are periodic.
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Communicated by J. N. Mather
Partially supported by NSF Grant DMS 88-02643
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Gutkin, E., Simanyi, N. Dual polygonal billiards and necklace dynamics. Commun.Math. Phys. 143, 431–449 (1992). https://doi.org/10.1007/BF02099259
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DOI: https://doi.org/10.1007/BF02099259