Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ground state of the Kondo model with large spin   In this paper, we prove that the ground state of the Kondo model with large
spin is nondegenerate, apart from a SU(2) spin degeneracy in the case of half
filling. The ground state spin is found for the system, and the energy level
orderings are discussed. Finally, the existence of ferrimagnetism in some cases
is proved.

33
The categories of this paper are: plasm-ph
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
37
The categories of this paper are: supr-con
27
The categories of this paper are: comp-gas
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
10
The categories of this paper are: q-bio
30
The categories of this paper are: q-alg
13
The categories of this paper are: quant-ph