Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Exact results for a Kondo impurity with electronic correlations   An one dimensional model of a Kondo impurity with arbitrary spin in the
presence of electronic correlations is solved exactly. The Bethe ansatz
equations are obtained for the case of quadratic dispersion. The ground state
is studied in the thermodynamic limit, and the magnetic susceptibility at zero
temperature is calculated.

14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
21
The categories of this paper are: adap-org
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
17
The categories of this paper are: q-fin
12
The categories of this paper are: nucl-th
3
The categories of this paper are: physics
34
The categories of this paper are: chem-ph
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph