Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The monodromy representation and twisted period relations for Appell's
  hypergeometric function F_4   We consider the system $\mathcal{F}_4(a,b,c)$ of differential equations
annihilating Appell's hypergeometric series $F_4(a,b,c;x)$. We find the
integral representations for four linearly independent solutions expressed by
the hypergeometric series $F_4$. By using the intersection forms of twisted
(co)homology groups associated with them, we provide the monodromy
representation of $\mathcal{F}_4(a,b,c)$ and the twisted period relations for
the fundamental systems of solutions of $\mathcal{F}_4$.

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The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
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The categories of this paper are: math-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: q-bio
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The categories of this paper are: hep-th
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The categories of this paper are: nucl-ex
34
The categories of this paper are: chem-ph
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The categories of this paper are: astro-ph
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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: bayes-an
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The categories of this paper are: nucl-th
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The categories of this paper are: econ
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex