Differential Inclusions, Control and Optimization 24 (2004)
3140
doi: 10.7151/dmdico.1050
Dimitrios A. Kandilakis
Department of Sciences
Technical University of Crete
Chania, Crete 73100, Greece
email: dkan@science.tuc.gr

Keywords and phrases: variational methods, PalaisSmale condition, saddle point theorem, mountain pass theorem.
2000 Mathematics Subject Classification: 35J20, 35J60.
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Received 7 March 2004