Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Structure of the tensor product semigroup   We study structure of the semigroup Tens(G) consisting of triples of dominant
weights (\lambda,\mu,\nu) of a complex reductive Lie group G such that the
triple tensor product of the corresponding irreducible representations of G has
a nonzero G-invariant vector. We prove two general structural results for
Tens(G) and give an explicit computation of Tens(G) for G=Sp(4,C) and G=G_2.

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The categories of this paper are: comp-gas
3
The categories of this paper are: physics
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The categories of this paper are: econ
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-alg
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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: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: mtrl-th
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The categories of this paper are: math-ph
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The categories of this paper are: astro-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: cmp-lg