Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Remark on the variational principle in the AdS/CFT correspondence for
  the scalar field   We discuss how the variational principle can be used as a criterion for
choosing, among scalar field actions implying the same equation of motion, the
appropriate one for the AdS/CFT correspondence.

3
The categories of this paper are: physics
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
24
The categories of this paper are: dg-ga
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat