Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On multi-soliton solutions to the Heisenberg ferromagnetic spin chain
  equation in (2+1)-dimensions   This paper concentrates on the Heisenberg ferromagnetic spin chain (HFSC)
equation in (2+1)-dimensions modelling nonlinear wave propagation in
ferromagnetic spin chain. A variable transformation is first employed to reduce
the studied equation. And then an associated matrix Riemann-Hilbert problem is
built on the real line through analyzing spectral problem of the reduced
equation. As a consequence, solving the obtained matrix Riemann-Hilbert problem
with the identity jump matrix, corresponding to the reflectionless, the general
multi-soliton solutions to the HFSC equation in (2+1)-dimensions are acquired.
Specially, the one- and two-soliton solutions are worked out and analyzed
graphically.

5
The categories of this paper are: gr-qc
15
The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
29
The categories of this paper are: funct-an
7
The categories of this paper are: hep-th
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
0
The categories of this paper are: hep-ph
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg