Title: Hard Balls Gas and Alexandrov Spaces of Curvature Bounded Above
This lecture is an attempt to give a very elementary account of a circle of results (joint with S. Ferleger and A. Kononenko) in the theory of semi-dispersing billiard systems. These results heavily rely on the methods and ideology of the geometry of non-positively curved length spaces.
1991 Mathematics Subject Classification:
Keywords and Phrases:
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