Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The rational Sklyanin algebra and the Wilson and para-Racah polynomials   The relation between Wilson and para-Racah polynomials and representations of
the degenerate rational Sklyanin algebra is established. Second order Heun
operators on quadratic grids with no diagonal terms are determined. These
special or S-Heun operators lead to the rational degeneration of the Sklyanin
algebra; they also entail the contiguity and structure operators of the Wilson
polynomials. The finite-dimensional restriction yields a representation that
acts on the para-Racah polynomials.

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The categories of this paper are: hep-th
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-lat
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The categories of this paper are: quant-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: q-fin
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The categories of this paper are: chao-dyn
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: plasm-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: funct-an