Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The key role of the Calan/Tololo project in the discovery of the
  accelerating Universe   The Nobel Prize in Physics 2011 has just been awarded to three astronomers:
Saul Perlmutter, Brian Schmidt, and Adam Riess, for their amazing discovery of
the accelerating expansion of the Universe. Without diminishing the achievement
of our community's laureates, here I elaborate on the role of the C&T project
in this discovery.

0
The categories of this paper are: hep-ph
8
The categories of this paper are: hep-ex
12
The categories of this paper are: nucl-th
9
The categories of this paper are: nlin
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
10
The categories of this paper are: q-bio
17
The categories of this paper are: q-fin
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
16
The categories of this paper are: stat
1
The categories of this paper are: cs
7
The categories of this paper are: hep-th
34
The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
28
The categories of this paper are: alg-geom