Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Epimorphisms from 2-bridge link groups onto Heckoid groups (I)   Riley "defined" the Heckoid groups for 2-bridge links as Kleinian groups,
with nontrivial torsion, generated by two parabolic transformations, and he
constructed an infinite family of epimorphisms from 2-bridge link groups onto
Heckoid groups. In this paper, we make Riley's definition explicit, and give a
systematic construction of epimorphisms from 2-bridge link groups onto Heckoid
groups, generalizing Riley's construction.

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The categories of this paper are: chao-dyn
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The categories of this paper are: math-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: cs
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: physics
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The categories of this paper are: solv-int
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
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The categories of this paper are: adap-org
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The categories of this paper are: q-alg