Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Elliptic Ding-Iohara Algebra and the Free Field Realization of the
  Elliptic Macdonald Operator   The Ding-Iohara algebra is a quantum algebra arising from the free field
realization of the Macdonald operator. Starting from the elliptic kernel
function introduced by Komori, Noumi and Shiraishi, we can define an elliptic
analog of the Ding-Iohara algebra. The free field realization of the elliptic
Macdonald operator is also constructed.

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The categories of this paper are: astro-ph
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: q-alg
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-ex
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The categories of this paper are: cmp-lg
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The categories of this paper are: bayes-an
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: cs
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The categories of this paper are: econ
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The categories of this paper are: gr-qc
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The categories of this paper are: stat
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The categories of this paper are: hep-ph