Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Geometry and integrability of the M-LXIX equation   The L-equivalent counterpart of the M-LXIX equation is found. This
L-equivalent equation is the Gauss-Codazzi equation which is integrable by the
dressing method. This means that the M-LXIX equation is also integrable in this
sense.

37
The categories of this paper are: supr-con
10
The categories of this paper are: q-bio
25
The categories of this paper are: patt-sol
22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
7
The categories of this paper are: hep-th
8
The categories of this paper are: hep-ex
1
The categories of this paper are: cs
6
The categories of this paper are: astro-ph
27
The categories of this paper are: comp-gas
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
17
The categories of this paper are: q-fin
34
The categories of this paper are: chem-ph