Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Multidimensional Toda Lattices: Continuous and Discrete Time   In this paper we present multidimensional analogues of both the continuous-
and discrete-time Toda lattices. The integrable systems that we consider here
have two or more space coordinates. To construct the systems, we generalize the
orthogonal polynomial approach for the continuous and discrete Toda lattices to
the case of multiple orthogonal polynomials.

17
The categories of this paper are: q-fin
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
18
The categories of this paper are: econ
31
The categories of this paper are: ao-sci
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
8
The categories of this paper are: hep-ex