Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Instability of charged black holes in anti-de Sitter space   We exhibit a tachyonic mode in a linearized analysis of perturbations of
large anti-de Sitter Reissner-Nordstrom black holes in four dimensions. In the
large black hole limit, and up to a 0.7% discrepancy which is probably
round-off error in the numerical analysis, the tachyon appears precisely when
the black hole becomes thermodynamically unstable.

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The categories of this paper are: mtrl-th
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The categories of this paper are: atom-ph
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: eess
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The categories of this paper are: bayes-an
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The categories of this paper are: stat
1
The categories of this paper are: cs
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The categories of this paper are: q-alg
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The categories of this paper are: plasm-ph
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The categories of this paper are: nlin
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The categories of this paper are: solv-int
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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: ao-sci