Instruct: Identify the main and secondary category of Arxiv papers based on the titles
Query: Combinatorial Gelfand Models   A combinatorial construction of a Gelafand model for the symmetric group and
its Iwahori-Hecke algebra is presented.

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The categories of this paper are: hep-th
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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: q-fin
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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: nucl-ex
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The categories of this paper are: bayes-an
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The categories of this paper are: dg-ga
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The categories of this paper are: eess
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: chao-dyn
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The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
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The categories of this paper are: gr-qc