In this paper we prove the existence of solutions to the semi-linear problem
at resonance. We assume a Landesman-Lazer type condition and use a variational method based on the Saddle Point Theorem.
Submitted September 8, 2000. Published January 3, 2001.
Math Subject Classifications: 35J70, 35P30, 47H15.
Key Words: resonance, eigenvalue, Landesman-Lazer condition.
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| Petr Tomiczek |
Department of Mathematics
University of West Bohemia
Univerzitni 22, 306 14 Plzen, Czech Republic
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