Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Isoperimetric Bounds for Eigenvalues of the Wentzell-Laplace, the
  Laplacian and a biharmonic Steklov Problem   In this paper, we prove some isoperimetric bounds for lower order eigenvalues
of the Wentzell-Laplace operator on bounded domains of a Euclidean space or a
Hadamard manifold, of the Laplacian on closed hypersurfaces of a Euclidean
space or a Hadamard manifold, and of a biharmonic Steklov problem on bounded
domains of a Euclidean space. Especially, interesting rigidity results can be
obtained if sharp bounds were achieved.

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The categories of this paper are: physics
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: ao-sci
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The categories of this paper are: atom-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: cs
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: math-ph