Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonzero positive solutions of a multi-parameter elliptic system with
  functional BCs   We prove, by topological methods, new results on the existence of nonzero
positive weak solutions for a class of multi-parameter second order elliptic
systems subject to functional boundary conditions. The setting is fairly
general and covers the case of multi-point, integral and nonlinear boundary
conditions. We also present a non-existence result. We provide some examples to
illustrate the applicability our theoretical results.

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The categories of this paper are: math-ph
3
The categories of this paper are: physics
9
The categories of this paper are: nlin
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The categories of this paper are: econ
8
The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: q-fin
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg