Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Order parameter of a three-dimensional Ising-like system in the simplest
  and higher non-Gaussian approximations   The application of the collective variables method to the study of the
behaviour of nonuniversal characteristics of the system in the critical region
is illustrated by an example of the order parameter. Explicit expressions for
the order parameter (the average spin moment) of a three-dimensional uniaxial
magnet are obtained in approximations of quartic and sextic non-Gaussian
fluctuation distributions (the \rho^4 and \rho^6 models, respectively), taking
into account confluent corrections. Some distinctive features appearing in the
process of calculating the order parameter on the basis of two successive
non-Gaussian approximations are indicated. The dependence of the average spin
moment of an Ising-like system on the temperature and microscopic parameters is
studied.

8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
7
The categories of this paper are: hep-th
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
14
The categories of this paper are: math-ph
20
The categories of this paper are: acc-phys
36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
22
The categories of this paper are: chao-dyn
18
The categories of this paper are: econ
12
The categories of this paper are: nucl-th
19
The categories of this paper are: eess