It is known that the first eigenfunction of the clamped plate equation,
is not necessarily of fixed sign. In this article, we survey the relations between domains and the sign of that first eigenfunction.
Published January 8, 2001.
Math Subject Classifications: 35J30, 35P99.
Key Words: clamped plate, first eigenfunction, maximum principle, biharmonic.
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| Guido Sweers |
Applied Mathematical Analysis, ITS Faculty
Delft University of Technology
Mekelweg 4, 2628 CD Delft, The Netherlands
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