Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Rejection lemma and almost split sequences   We study the behaviour of almost split sequences and \art quivers of an order
under rejection of bijective modules. In particular, we establish relations of
stable categories and almost split sequences for an order $A$ and the order
$A'$ obtained from $A$ by such rejection. These results are specified for
Gorenstein and Frobenius cases.

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The categories of this paper are: nucl-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: chem-ph
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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: hep-th
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The categories of this paper are: physics
4
The categories of this paper are: cond-mat
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The categories of this paper are: q-bio
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: nlin
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The categories of this paper are: patt-sol
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The categories of this paper are: comp-gas