Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Two Families of Finsler Metrics Projectively Related to a Kropina Metric   In this paper, we find the necessary and sufficient conditions under which
two classes of (q, a, b)-metrics are projectively related to a Kropina metric.

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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: mtrl-th
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The categories of this paper are: cond-mat
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The categories of this paper are: solv-int
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The categories of this paper are: atom-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-lat
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The categories of this paper are: nlin
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The categories of this paper are: dg-ga
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The categories of this paper are: acc-phys
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The categories of this paper are: math-ph
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: patt-sol