Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Reactor Neutrinos: Toward Oscillations   I shall sketch the history of reactor neutrino physics over five decades
since the Reines-Cowan proof of neutrino existence in the late 50s, till the
advent of the present era of precision reactor neutrino oscillation
experiments. There are three chapters of this story: i) Exploration of
possibilities of the reactor neutrinos in the 60s and 70s; ii) Looking for
oscillations under the streetlamp in the 80s and 90s; iii) Exploring
oscillations in detail with known (almost) $\Delta m^2_{atm}$ and $\Delta
m^2_{sol}$.}

2
The categories of this paper are: math
37
The categories of this paper are: supr-con
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
17
The categories of this paper are: q-fin
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
25
The categories of this paper are: patt-sol
23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
19
The categories of this paper are: eess