# American Institute of Mathematical Sciences

April  2005, 12(3): 531-554. doi: 10.3934/dcds.2005.12.531

## Describing a class of global attractors via symbol sequences

 1 Institut für Mathematik I, Freie Universität Berlin, Arnimallee 2-6, 14195 Berlin, Germany 2 Weierstrass Institute for Applied Analysis and Stochastics, Mohrenstr. 39, 10117 Berlin, Germany

Received  May 2003 Revised  October 2004 Published  December 2004

We study a singularly perturbed scalar reaction-diffusion equation on a bounded interval with a spatially inhomogeneous bistable nonlinearity. For certain nonlinearities, which are piecewise constant in space on $k$ subintervals, it is possible to characterize all stationary solutions for small $\varepsilon$ by means of sequences of $k$ symbols, indicating the behavior of the solution in each subinterval. Determining also Morse indices and zero numbers of the equilibria in terms of the symbol sequences, we are able to give a criterion for heteroclinic connections and a description of the associated global attractor for all $k$.
Citation: Jörg Härterich, Matthias Wolfrum. Describing a class of global attractors via symbol sequences. Discrete & Continuous Dynamical Systems - A, 2005, 12 (3) : 531-554. doi: 10.3934/dcds.2005.12.531
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