Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: GENIUS project, neutrino oscillations and Cosmology: neutrinos reveal
  their nature?   The neutrinoless double beta decay as well as any other laboratory experiment
has not been able to answer the question of the neutrino's nature. Hints on the
answer are available when neutrino oscillations and $(\beta\beta)_{0 \nu}$ are
considered simultaneously. In this case phenomenologically interesting neutrino
mass schemes can lead to non-vanishing and large values of $<m_{\nu}>$. As a
consequence, some schemes with Majorana neutrinos can be ruled out even now. If
we assume that in addition neutrinos contribute to Hot Dark Matter then the
window for Majorana neutrinos is even more restricted, e.g. GENIUS experiment
will be sensitive to scenarios with three Majorana neutrinos.

5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
24
The categories of this paper are: dg-ga
1
The categories of this paper are: cs
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
20
The categories of this paper are: acc-phys
4
The categories of this paper are: cond-mat
30
The categories of this paper are: q-alg
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
28
The categories of this paper are: alg-geom
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph