Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Non-Radiative Accretion and Thermodynamics   It has been suggested that the laws of thermodynamics are violated by what we
have called a convection-dominated accretion flow (or a 1/2-law accretion flow)
-- an accretion flow characterized by a constant outflow of energy. We show
that both the 1/2-law flow and the Bondi flow (also known as ADAF, advection
dominated accretion flow) are thermodynamically admissible.

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The categories of this paper are: adap-org
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The categories of this paper are: solv-int
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: hep-th
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The categories of this paper are: bayes-an
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The categories of this paper are: gr-qc
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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: dg-ga
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The categories of this paper are: q-alg
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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: atom-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: physics