Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauge Coupling Unification in GUT and String Models   The results for the running of the gauge couplings in the MSSM are up-dated
by proper inclusion of all low scale effects. They are presented as predictions
for the strong coupling constant in the scenario with only two parameters at
the GUT scale ~ ($\alpha_{U}$ ~and ~$M_{U}$) ~and as a mismatch of the
couplings at the scales ~$\sim 3 \times 10^{16}$ GeV ~and ~$4\times10^{17}$
GeV, when all three couplings are taken as the experimental input.

13
The categories of this paper are: quant-ph
29
The categories of this paper are: funct-an
33
The categories of this paper are: plasm-ph
15
The categories of this paper are: nucl-ex
24
The categories of this paper are: dg-ga
5
The categories of this paper are: gr-qc
26
The categories of this paper are: bayes-an
22
The categories of this paper are: chao-dyn
19
The categories of this paper are: eess
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
23
The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
28
The categories of this paper are: alg-geom
1
The categories of this paper are: cs