Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Lectures on black holes and the AdS_3 / CFT_2 correspondence   We present a detailed discussion of AdS_3 black holes and their connection to
two-dimensional conformal field theories via the AdS/CFT correspondence. Our
emphasis is on deriving refined versions of black hole partition functions,
that include the effect of higher derivative terms in the spacetime action as
well as non-perturbative effects. We include background material on gravity in
AdS_3, in the context of holographic renormalization.

28
The categories of this paper are: alg-geom
5
The categories of this paper are: gr-qc
36
The categories of this paper are: cmp-lg
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The categories of this paper are: supr-con
6
The categories of this paper are: astro-ph
18
The categories of this paper are: econ
35
The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol
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The categories of this paper are: stat
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: comp-gas