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Towards an L p -potential theory for sub-Markovian semigroups: variational inequalities and balayage theory

Towards an L p -potential theory for sub-Markovian semigroups: variational inequalities and... We give a new variational approach to L p -potential theory for sub-Markovian semigroups. It is based on the observation that the Gâteaux-derivative of the corresponding L p -energy functional is a monotone operator. This allows to apply the well established theory of Browder and Minty on monotone operators to the nonlinear problems in L p -potential theory. In particular, using this approach it is possible to avoid any symmetry assumptions of the underlying semigroup. We prove existence of corresponding ( r, p )-equilibrium potentials and obtain a complete characterization in terms of a variational inequality. Moreover we investigate associated potentials and encounter a natural interpretation of the so-called nonlinear potential operator in the context of monotone operators. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Evolution Equations Springer Journals

Towards an L p -potential theory for sub-Markovian semigroups: variational inequalities and balayage theory

Journal of Evolution Equations , Volume 4 (2) – May 1, 2004

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References (28)

Publisher
Springer Journals
Copyright
Copyright © 2004 by Birkhäuser-Verlag
Subject
Mathematics
ISSN
1424-3199
eISSN
1424-3202
DOI
10.1007/s00028-003-0145-4
Publisher site
See Article on Publisher Site

Abstract

We give a new variational approach to L p -potential theory for sub-Markovian semigroups. It is based on the observation that the Gâteaux-derivative of the corresponding L p -energy functional is a monotone operator. This allows to apply the well established theory of Browder and Minty on monotone operators to the nonlinear problems in L p -potential theory. In particular, using this approach it is possible to avoid any symmetry assumptions of the underlying semigroup. We prove existence of corresponding ( r, p )-equilibrium potentials and obtain a complete characterization in terms of a variational inequality. Moreover we investigate associated potentials and encounter a natural interpretation of the so-called nonlinear potential operator in the context of monotone operators.

Journal

Journal of Evolution EquationsSpringer Journals

Published: May 1, 2004

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