Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On Treves' Algebraic Characterization of the KdV Hierarchy   We have found a possibility to streamline the proof of the Treves' theorem
(Duke Math. J., 108, 251-295, 2001) on an algebraic characterization of the KdV
hierarchy which makes it significantly shorter, following essentially the logic
of the original proof.

6
The categories of this paper are: astro-ph
22
The categories of this paper are: chao-dyn
36
The categories of this paper are: cmp-lg
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
18
The categories of this paper are: econ
7
The categories of this paper are: hep-th
12
The categories of this paper are: nucl-th
34
The categories of this paper are: chem-ph
21
The categories of this paper are: adap-org
4
The categories of this paper are: cond-mat
31
The categories of this paper are: ao-sci
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg