Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Finite groups with the same character tables, Drinfel'd algebras and
  Galois algebras   We prove that finite groups have the same complex character tables iff the
group algebras are twisted forms of each other as Drinfel'd quasi-bialgebras or
iff there is non-associative bi-Galois algebra over these groups. The
interpretations of class-preserving automorphisms and permutation
representations with the same character in terms of Drinfel'd algebras are also
given.

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The categories of this paper are: hep-lat
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The categories of this paper are: chao-dyn
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The categories of this paper are: alg-geom
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: ao-sci
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The categories of this paper are: dg-ga
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The categories of this paper are: cond-mat
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The categories of this paper are: stat
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: nlin