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Published in Russian in Doklady Akademii Nauk, 2011, Vol. 438, No. 5, pp. 590–592.
The article was translated by the authors.
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Glutsyuk, A.A., Kudryashov, Y.G. On quadrilateral orbits in planar billiards. Dokl. Math. 83, 371–373 (2011). https://doi.org/10.1134/S1064562411030343
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DOI: https://doi.org/10.1134/S1064562411030343
Keywords
- Periodic Orbit
- Analytic Continuation
- Smooth Boundary
- Periodic Point
- Measure Zero