Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dirac Sea for Bosons I -- Formulation of Negative Energy Sea for Bosons   It is proposed to make formulation of second quantizing a bosonic theory by
generalizing the method of filling the Dirac negative energy sea for fermions.
We interpret that the correct vacuum for the bosonic theory is obtained by
adding minus one boson to each single particle negative energy states while the
positive energy states are empty. The boson states are divided into two sectors
; the usual positive sector with positive and zero numbers of bosons and the
negative sector with negative numbers of bosons. Once it comes into the
negative sector it cannot return to the usual positive sector by ordinary
interaction due to a barrier. It is suggested to use as a playground model in
which the filling of empty fermion Dirac sea and the removal of boson from the
negative energy states are not yet performed. We put forward such a naive
vacuum world in the present paper. The successive paper will concern a CPT-like
Theorem in the naive vacuum world.

22
The categories of this paper are: chao-dyn
5
The categories of this paper are: gr-qc
16
The categories of this paper are: stat
30
The categories of this paper are: q-alg
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
32
The categories of this paper are: atom-ph
25
The categories of this paper are: patt-sol
3
The categories of this paper are: physics
8
The categories of this paper are: hep-ex
33
The categories of this paper are: plasm-ph
10
The categories of this paper are: q-bio
4
The categories of this paper are: cond-mat
1
The categories of this paper are: cs
21
The categories of this paper are: adap-org