Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Modified gravity from an entropy functional   We extend Padmanabhan's entropy functional formalism to show that, in
addition to the Gauss-Bonnet or the entire series of Lanczos-Lovelock
Lagrangians already obtained, more general higher-order corrections to General
Relativity, i.e., the so-called modified gravity theories, also emerge
naturally from this formalism. This extension shows that the formalism
constitutes a valuable tool to investigate, at each order in the curvature, the
possible structure the higher-order modified gravity theories might have. As an
application, the extended formalism is used to evaluate the horizon entropy in
a modified gravity theory of the second-order in the curvature. Our findings
are in agreement with previous results from the literature.

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The categories of this paper are: physics
32
The categories of this paper are: atom-ph
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The categories of this paper are: hep-lat
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-th
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The categories of this paper are: math
23
The categories of this paper are: solv-int
37
The categories of this paper are: supr-con
0
The categories of this paper are: hep-ph
35
The categories of this paper are: mtrl-th
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The categories of this paper are: astro-ph
12
The categories of this paper are: nucl-th
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The categories of this paper are: q-bio
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The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
15
The categories of this paper are: nucl-ex