Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Defining relations for automorphism groups of free algebras   We describe a set of defining relations for automorphism groups of finitely
generated free algebras of Nielsen-Schreier varieties. In particular, this
gives a representation of the automorphism groups of free Lie algebras by
generators and defining relations.

10
The categories of this paper are: q-bio
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The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
7
The categories of this paper are: hep-th
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The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
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The categories of this paper are: stat
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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: gr-qc
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The categories of this paper are: comp-gas
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The categories of this paper are: chem-ph
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The categories of this paper are: cond-mat
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The categories of this paper are: funct-an
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The categories of this paper are: cmp-lg