Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Conserved charges of non-yangian type for the Frahm-Polychronakos spin
  chain   Through an $\hbar$-expansion of the confined Calogero model with spin
exchange interactions, we extract a generating function for the involutive
conserved charges of the Frahm-Polychronakos spin chain. The resulting
conservation laws possess the spin chain yangian symmetry, although they are
not expressible in terms of these yangians.

15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
6
The categories of this paper are: astro-ph
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
1
The categories of this paper are: cs
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph