Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Robin problems with a general potential and a superlinear reaction   We consider semilinear Robin problems driven by the negative Laplacian plus
an indefinite potential and with a superlinear reaction term which need not
satisfy the Ambrosetti-Rabinowitz condition. We prove existence and
multiplicity theorems (producing also an infinity of smooth solutions) using
variational tools, truncation and perturbation techniques and Morse theory
(critical groups).

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The categories of this paper are: comp-gas
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The categories of this paper are: plasm-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
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The categories of this paper are: physics
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: math-ph
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The categories of this paper are: nlin
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The categories of this paper are: q-fin
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The categories of this paper are: cs
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-th
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The categories of this paper are: stat