# American Institute of Mathematical Sciences

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January  2007, 17(1): 133-141. doi: 10.3934/dcds.2007.17.133

## Entropy dimensions and a class of constructive examples

 1 Institut de Mathématiques de Luminy, Case 907, 163 av. de Luminy, F13288 Marseille Cedex 9, France 2 Department of Mathematics, Ajou University, Suwon 442-729, South Korea

Received  February 2005 Revised  June 2006 Published  October 2006

Motivated by the study of actions of $\Z^{2}$ and more general groups, and their non-cocompact subgroup actions, we investigate entropy-type invariants for deterministic systems. In particular, we define a new isomorphism invariant, the entropy dimension, and look at its behaviour on examples. We also look at other natural notions suitable for processes.
Citation: Sébastien Ferenczi, Kyewon Koh Park. Entropy dimensions and a class of constructive examples. Discrete & Continuous Dynamical Systems - A, 2007, 17 (1) : 133-141. doi: 10.3934/dcds.2007.17.133
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