Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Black holes in extended gravity theories in Palatini formalism   We consider several physical scenarios where black holes within classical
gravity theories including $R^2$ and Ricci-squared corrections and formulated
\`a la Palatini can be analytically studied.

6
The categories of this paper are: astro-ph
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The categories of this paper are: adap-org
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The categories of this paper are: eess
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The categories of this paper are: hep-lat
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The categories of this paper are: plasm-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: q-bio
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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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: hep-th
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The categories of this paper are: cmp-lg
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The categories of this paper are: dg-ga