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Existence of variational solutions for time dependent integrands via minimizing movements

  • Leah Schätzler EMAIL logo
Published/Copyright: October 25, 2017

Abstract

We prove the existence of variational solutions to equations of the form

tu-div(Dξf(x,t,Du))=0,

where the function f merely satisfies a p-growth condition and is convex with respect to the gradient variable. In particular, we do not require any regularity assumption with respect to time. We obtain an existence result for integrands that are Lipschitz continuous in time via the method of minimizing movements. For the general existence result, we show stability of solutions with respect to approximation of the integrands. In this context, we prove a result related to Γ-convergence that is also valid for functionals with (p,q)-growth.

MSC 2010: 35K20; 49J40

Acknowledgements

I thank my adviser, Professor Frank Duzaar, for giving me this interesting topic and for his helpful remarks. I also thank Professor Jan Kristensen (Oxford), who has suggested the use of the bi-polar construction in Section 3.

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Received: 2017-9-21
Accepted: 2017-9-21
Published Online: 2017-10-25
Published in Print: 2017-11-1

© 2017 Walter de Gruyter GmbH, Berlin/Boston

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