Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Neutrino Mass Seesaw Version 3: Recent Developments   The origin of neutrino mass is usually attributed to a seesaw mechanism,
either through a heavy Majorana fermion singlet (version 1) or a heavy scalar
triplet (version 2). Recently, the idea of using a heavy Majorana fermion
triplet (version 3) has gained some attention. This is a review of the basic
idea involved, its U(1) gauge extension, and some recent developments.

24
The categories of this paper are: dg-ga
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The categories of this paper are: alg-geom
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The categories of this paper are: q-fin
14
The categories of this paper are: math-ph
2
The categories of this paper are: math
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics
26
The categories of this paper are: bayes-an
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The categories of this paper are: atom-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: eess
5
The categories of this paper are: gr-qc
37
The categories of this paper are: supr-con
21
The categories of this paper are: adap-org