We answer the question whether a billiard system is a new integrable system or not. This question is posed by H. J. Korsch, H.-J. Jodl, and T. Hartmann in [1],[2]. The answer is NO, that is, the billiard system is nothing but an elliptic billiard system, which is well-known to be integrable.
雑誌名
山形大学紀要. 自然科学 = Bulletin of Yamagata University. Natural Science