Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Successive Phase Transitions in Antiferroelectric Liquid Crystal Systems   An axial next-nearest-neighbor XY model is studied as a model of chiral
liquid crystals which exhibit many ferro-, ferri- and antiferroelectric tilted
smectic phases. Depending on the values of interaction parameters, this model
exhibits Ising symmetric (i.e., the tilt directions of directors are parallel
or anti parallel) phases or XY symmetric phases. Phases with each
type-of-symmetry show the character of devil's staircase, which has been
observed in experiments.

37
The categories of this paper are: supr-con
5
The categories of this paper are: gr-qc
21
The categories of this paper are: adap-org
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
34
The categories of this paper are: chem-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
31
The categories of this paper are: ao-sci
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
23
The categories of this paper are: solv-int
2
The categories of this paper are: math
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ