Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Junction Conditions in f(R) Theories of Gravity   Taking advantage of the conformal equivalence of f(R) theories of gravity
with General Relativity coupled to a scalar field we generalize the Israel
junction conditions for this class of theories by direct integration of the
field equations. We suggest a specific non-minimal coupling of matter to
gravity which opens the possibility of a new class of braneworld scenarios.

9
The categories of this paper are: nlin
36
The categories of this paper are: cmp-lg
10
The categories of this paper are: q-bio
33
The categories of this paper are: plasm-ph
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
13
The categories of this paper are: quant-ph
2
The categories of this paper are: math
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
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The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
18
The categories of this paper are: econ
20
The categories of this paper are: acc-phys
12
The categories of this paper are: nucl-th
26
The categories of this paper are: bayes-an