New Maximal Regularity Results for the Heat Equation in Exterior Domains, and Applications
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Abstract
This paper is dedicated to the proof of new maximal regularity results involving Besov spaces for the heat equation in the half-space or in bounded or exterior domains of ℝ n . We strive for time independent, a priori estimates in regularity spaces of type L 1(0, T; X) where X stands for some homogeneous Besov space. In the case of bounded domains, the results that we get are similar to those of the whole space or of the half-space. For exterior domains, we need to use mixed Besov norms in order to get a control on the low frequencies. Those estimates are crucial for proving global-in-time results for nonlinear heat equations in a critical functional framework.
Key words
Besov spaces Exterior domain Heat equation Maximal regularity L1 regularityNotes
Acknowledgements
The second author has been supported by the MN grant IdP2011 000661.
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