Large deviations, Gibbs measures and closed orbits for hyperbolic flows.
Le flot géodésique des variétés riemanniennes à courbure négative
Lissajous knots and billiard knots
We show that Lissajous knots are equivalent to billiard knots in a cube. We consider also knots in general 3-dimensional billiard tables. We analyse symmetry of knots in billiard tables and show in particular that the Alexander polynomial of a Lissajous knot is a square modulo 2.