Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A variational approach to homogeneous scalar fields in General
  Relativity   A result of existence of homogeneous scalar field solutions between
prescribed configurations is given, using a modified version of
Euler--Maupertuis least action variational principle. Solutions are obtained as
limit of approximating variational problems, solved using techniques introduced
by Rabinowitz.

27
The categories of this paper are: comp-gas
12
The categories of this paper are: nucl-th
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
26
The categories of this paper are: bayes-an
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph