Stable and unstable sets of C<sup>0</sup> perturbations of expansive homeomorphisms of surfaces
Marcelo Cerminara; Martin Sambarino; Marcelo Cerminara; MERL, Facultad de Ingeniería, Universidad de la República, CC 30 Montevideo, Uruguay; Martin Sambarino; MERL, Facultad de Ingeniería, Universidad de la República, CC 30 Montevideo, Uruguay
Журнал:
Nonlinearity
Дата:
1999-03-01
Аннотация:
Let M be a compact metric space and g: M --> M be an homeomorphism C<sup>0</sup>-close to an expansive map of M. In general, it is not true that g is also expansive, but it still has some properties resembling the expansivity. In fact, if we identify pairs of points whose g-orbits stay nearby, both for the future and the past, we obtain an equivalence relation~. The quotient space M / ~ is a compact, metric space and g induces an expansive homeomorphism on that quotient. If M is a surface, we show that for any the connected component of the local stable (unstable) set containing is nontrivial and arc-wise connected. AMS classification scheme numbers: 58F30, 58F15, 54H20, 54F15
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