Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nonequilibrium cosmic neutrinos and nucleosynthesis   The neutrino role in primordial nucleosynthesis is reviewed. The importance
of nonequilibrium effects is emphasized both for the standard massless and
possibly massive neutrinos. The upper bound on tau neutrino mass is presented.
A spatial variation of primordial abundances and a possibility of observing
them by precise measurements of the CMB anisotropy are considered.The
nucleosynthesis bounds on the parameters of neutrino oscillations into sterile
neutrinos are discussed.

17
The categories of this paper are: q-fin
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
3
The categories of this paper are: physics
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
32
The categories of this paper are: atom-ph
36
The categories of this paper are: cmp-lg
19
The categories of this paper are: eess
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
16
The categories of this paper are: stat