Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Classical Entropy of N=2 Black Holes: The minimal coupling case   We discuss the entropy and the transformation properties of classical
extremal N=2 black hole solutions in supergravity theories associated with the
minimal coupling models CP(n-1,1). The entropy is given by a manifestly
invariant quantity under the embedding of the duality group SU(1,n) into
Sp(2n+2) which is a symmetry of the classical BPS mass formula.

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The categories of this paper are: acc-phys
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The categories of this paper are: comp-gas
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: mtrl-th
5
The categories of this paper are: gr-qc
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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: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: alg-geom
0
The categories of this paper are: hep-ph
2
The categories of this paper are: math