Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Positive model structures for abstract symmetric spectra   We give a general method of constructing positive stable model structures for
symmetric spectra over an abstract simplicial symmetric monoidal model
category. The method is based on systematic localization, in Hirschhorn's
sense, of a ceratin positive projective model structure on spectra, where
positivity basically means the truncation of the zero slice. The localization
above is by the set of stabilizing morphisms, or their truncated version.

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The categories of this paper are: chem-ph
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The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: nucl-ex
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: patt-sol
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The categories of this paper are: q-bio
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The categories of this paper are: astro-ph
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The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
13
The categories of this paper are: quant-ph
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The categories of this paper are: q-fin