Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reverses of operator Acz\'el inequality   In this paper we present some inequalities involving operator decreasing
functions and operator means. These inequalities provide some reverses of
operator Acz\'el inequality dealing with the weighted geometric mean.

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The categories of this paper are: q-bio
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The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs
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The categories of this paper are: atom-ph
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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: hep-lat
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
8
The categories of this paper are: hep-ex
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The categories of this paper are: plasm-ph
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The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: ao-sci
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The categories of this paper are: q-alg