Lectures on the billiard
These lectures together with the appendices contain all the es sential steps for a proof of the ergodicity of the dynamical system described below as (M,T,v) or "periodic billiard's section, when the obstacles are so situated that no collisionless paths are possible.
KeywordsAbsolute Continuity Singularity Line Main Lemma Ergodic Property Discontinuity Line
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