Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A higher-rank version of the Q3 equation   A lattice system is derived which amounts to a higher-rank analogue of the Q3
equation, the latter being an integrable partial difference equation which has
appeared in the ABS list of multidimensionally consistent quadrilateral lattice
equations. By construction this new system incorporates various lattice
equations of Boussinesq type that were discovered many years ago. A
corresponding Lax representation is derived.

30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
27
The categories of this paper are: comp-gas
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
36
The categories of this paper are: cmp-lg
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
24
The categories of this paper are: dg-ga