Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A new (1+1)-dimensional matrix k-constrained KP hierarchy   We introduce a new generalization of matrix (1+1)-dimensional k-constrained
KP hierarchy. The new hierarchy contains matrix generalizations of stationary
DS systems, (2+1)-dimensional modified Korteweg-de Vries equation and the
Nizhnik equation. A binary Darboux transformation method is proposed for
integration of systems from this hierarchy.

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The categories of this paper are: cond-mat
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The categories of this paper are: supr-con
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
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The categories of this paper are: cs
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The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
21
The categories of this paper are: adap-org