Abstract
The global attractor, whose well established definition we recall below, is an object that captures the asymptotic behaviour of autonomous systems. The aim of this chapter is to introduce the ‘pullback attractor’, which seems to be the correct generalisation of this concept for use with non-autonomous processes. We pay particular attention to how this non-autonomous definition relates to the autonomous one.
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Notes
- 1.
The global attractor is the minimal compact set that attracts every bounded subset of the phase space, see Definition 1.5 and Lemma 1.6. While this definition is indeed ‘well established’, there are many possible definitions of ‘an attractor’, and it is probably not the case that there is one canonical definition (see Milnor 1985, for example).
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Carvalho, A.N., Langa, J.A., Robinson, J.C. (2013). The pullback attractor. In: Attractors for infinite-dimensional non-autonomous dynamical systems. Applied Mathematical Sciences, vol 182. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-4581-4_1
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