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1986
DOI: 10.1007/bfb0099031
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Invariant Manifolds, Entropy and Billiards; Smooth Maps with Singularities

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Cited by 263 publications
(272 citation statements)
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“…• As for regularity issues (curvature and distortion bounds, absolute continuity), it may be missleading that properties similar to our requirements automatically hold in the general framework of Pesin and Katok-Strelcyn theory, see [7] and [13]. Nonetheless, in our setting it is crucial to have uniform control of curvatures, distortions and holonomies on the phase space.…”
Section: The Conditions Of Ergodicitymentioning
confidence: 99%
“…• As for regularity issues (curvature and distortion bounds, absolute continuity), it may be missleading that properties similar to our requirements automatically hold in the general framework of Pesin and Katok-Strelcyn theory, see [7] and [13]. Nonetheless, in our setting it is crucial to have uniform control of curvatures, distortions and holonomies on the phase space.…”
Section: The Conditions Of Ergodicitymentioning
confidence: 99%
“…Pour certains ouverts convexes il existe des trajectoires du billiard qui ne sont pas définies pour tout temps t: la série des temps successifs entre rebonds converge (voir [7]). Cependant l'ensemble de tels points est de mesure nulle pour la mesure de Liouville (voir [10]j, on peut définir presque partout un flot (€?<) sur B(îî), laissant invariant la projection À sur B(0) de la mesure de Liouville À; par définition îî est un billiard ergodique si le système dynamique (B(îî), ((?<), A) l'est. Comme ((?<) n'est pas continu en général, il est délicat de traduire le théorème 4 de propagation en termes de mesures invariantes par le flot du billiard, c'est pourquoi nous introduirons plus loin une classe particulière de mesures sur 9^.S*(î. Jx Jx où h = -r_ est continue > 0 sur X. Notre théorème 1 découle alors du résultat général suivant:…”
Section: Mesures Invariantes Sur Des Billîards Convexesunclassified
“…Pesin first proved general results concerning the existence of families of stable manifolds and their absolute continuity (see [14]) and deduced therefrom the formula. Later, results were generalized to deterministic dynamical systems preserving only a Borel measure (see [18], [7]) and for dynamical systems with singularities (see [9]). In [4] one finds a comprehensive and self-contained account on the theory dynamical systems with nonvanishing Lyapunov exponents, i.e.…”
Section: Introductionmentioning
confidence: 99%