Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Relativistic membrane solutions in AdS$_4$   In this note we discuss various classical membrane solutions in AdS$_4$
spacetime: simple embeddings given by polynomials in ambient space, solutions
with non-linear waves, and piecewise linear solutions.

19
The categories of this paper are: eess
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
26
The categories of this paper are: bayes-an
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph