Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Dark Universe: The First Molecules   The dark Universe corresponds to the period between the thermal decoupling
matter-radiation and the formation of the first objects. During this epoq,
molecules can appeared. In this talk, I will recall the nucleosynthesis
processes, then the chemistry of the primordial Universe. I will discuss the
influence of the primordial molecules on the protocloud evolution .

1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg
13
The categories of this paper are: quant-ph
32
The categories of this paper are: atom-ph
17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
35
The categories of this paper are: mtrl-th
34
The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
16
The categories of this paper are: stat
15
The categories of this paper are: nucl-ex