Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Yoneda algebra of a K_2 algebra need not be another K_2 algebra   The Yoneda algebra of a Koszul algebra or a D-Koszul algebra is Koszul. K_2
algebras are a natural generalization of Koszul algebras, and one would hope
that the Yoneda algebra of a K_2 algebra would be another K_2 algebra. We show
that this is not necessarily the case by constructing a monomial K_2 algebra
for which the corresponding Yoneda algebra is not K_2.

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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: funct-an
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The categories of this paper are: q-bio
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: adap-org
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The categories of this paper are: comp-gas
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The categories of this paper are: hep-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: math-ph
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: q-fin
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The categories of this paper are: nucl-th