Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Cosmic scalar fields with flat potential   The dynamics of cosmic scalar fields with flat potential is studied. Their
contribution to the expansion rate of the universe is analyzed, and their
behaviour in a simple model of phase transitions is discussed.

11
The categories of this paper are: hep-lat
19
The categories of this paper are: eess
2
The categories of this paper are: math
35
The categories of this paper are: mtrl-th
29
The categories of this paper are: funct-an
1
The categories of this paper are: cs
15
The categories of this paper are: nucl-ex
8
The categories of this paper are: hep-ex
17
The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
26
The categories of this paper are: bayes-an
30
The categories of this paper are: q-alg
33
The categories of this paper are: plasm-ph