Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Spiral-Logarithmic Structure in a Heisenberg Ferromagnet   Spiral-logarithmic structure is suggested as a stationary solution of a
modified equation for the Heisenberg model, and the single- and N-soliton
solutions are constructed on this base.

2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
25
The categories of this paper are: patt-sol
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
24
The categories of this paper are: dg-ga
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
22
The categories of this paper are: chao-dyn
29
The categories of this paper are: funct-an
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
3
The categories of this paper are: physics