Eigenvalue inequalities for mixed Steklov problems

Details Eigenvalue inequalities for mixed Steklov problems Eigenvalue inequalities for mixed Steklov problems

2009-09-30

arxiv.org/abs/0909.5473v2

Mathematics

Spectral Theory

Major revision

Scientific paper

We extend some classical inequalities between the Dirichlet and Neumann eigenvalues of the Laplacian to the context of mixed Steklov--Dirichlet and Steklov--Neumann eigenvalue problems. The latter one is also known as the sloshing problem, and has been actively studied for more than a century due to its importance in hydrodynamics. The main results of the paper are applied to obtain certain geometric information about nodal sets of sloshing eigenfunctions. The key ideas of the proofs include domain monotonicity for eigenvalues of mixed Steklov problems, as well as an adaptation of Filonov's method developed originally to compare the Dirichlet and Neumann eigenvalues.

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