Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Supersymmetric Unification without Proton Decay   We present a supersymmetric grand unification scheme based on the gauge group
SU(3)_c X SU(3)_L X SU(3)_R in which the proton and the lightest supersymmetric
particle are stable, neutrinos are necessarily massive, and the observed baryon
asymmetry originates in the lepton sector. Such models are also consistent with
the measured value of sin^2\Theta_W as well as unification of the gauge
couplings.

8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
11
The categories of this paper are: hep-lat
12
The categories of this paper are: nucl-th
10
The categories of this paper are: q-bio
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
24
The categories of this paper are: dg-ga
6
The categories of this paper are: astro-ph
31
The categories of this paper are: ao-sci
1
The categories of this paper are: cs
35
The categories of this paper are: mtrl-th
27
The categories of this paper are: comp-gas
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org