Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On the theory of phase transition in muliferroics   In this paper we investigate peculiarities of phase transition high-symmetry
- incommensurate phase in inhomogeneous systems. We obtain the nonlinear
dispersion law and then present a renormalization group analysis of phase
transitions in multiferroics. We have determined the dependence of critical
indices on the nonextensivity parameter of the system.

18
The categories of this paper are: econ
36
The categories of this paper are: cmp-lg
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
5
The categories of this paper are: gr-qc
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
14
The categories of this paper are: math-ph
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom
13
The categories of this paper are: quant-ph