Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Jordan derivations of finitary incidence rings   Let $P$ be a preordered set, $R$ a ring and $FI(P,R)$ the finitary incidence
ring of $P$ over $R$. We find a criterion for all Jordan derivations of
$FI(P,R)$ to be derivations and generalize Theorem 3.3 from arXiv:1411.6123. In
particular, we prove that each Jordan derivation of the ring $RFM_I(R)$ of
row-finite $I\times I$-matrices over $R$ is a derivation, if $|I|>1$.

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The categories of this paper are: nlin
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: stat
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The categories of this paper are: atom-ph
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The categories of this paper are: acc-phys
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: chem-ph
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The categories of this paper are: funct-an