Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fermion States on the Sphere $S^2$   We solve for the spectrum and eigenfunctions of Dirac operator on the sphere.
The eigenvalues are nonzero whole numbers. The eigenfunctions are two-component
spinors which may be classified by representations of the SU(2) group with
half-integer angular momenta. They are not the conventional spherical spinors
but special linear combinations of those.

24
The categories of this paper are: dg-ga
30
The categories of this paper are: q-alg
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
35
The categories of this paper are: mtrl-th
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
2
The categories of this paper are: math
3
The categories of this paper are: physics
13
The categories of this paper are: quant-ph
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The categories of this paper are: comp-gas
34
The categories of this paper are: chem-ph
6
The categories of this paper are: astro-ph
9
The categories of this paper are: nlin
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The categories of this paper are: q-fin