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arxiv: 1406.1970 · v2 · pith:J2IO4H5Hnew · submitted 2014-06-08 · 🧮 math.DS

Simultaneous dense and nondense orbits for toral diffeomorphisms

classification 🧮 math.DS
keywords orbitsdenseforwardpairsdiffeomorphismsgeometricnondensepoints
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We show that, for pairs of hyperbolic toral automorphisms on the $2$-torus, the points with dense forward orbits under one map and nondense forward orbits under the other is a dense, uncountable set. The pair of maps can be noncommuting. We also show the same for pairs of $C^2$-Anosov diffeomorphisms on the $2$-torus. (The pairs must satisfy slight constraints.) Our main tools are the Baire Category theorem and a geometric construction that allows us to give a geometric characterization of the fractal that is the set of points with forward orbits that miss a certain open set.

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