Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Schwinger's oscillator method, supersymmetric quantum mechanics and
  massless particles   We consider the Schwinger's method of angular momentum addition using the
SU(2) algebra with both a fermionic and a bosonic oscillator. We show that the
total spin states obtained are: one boson singlet state and an arbitrary number
of spin-1/2 states, the later ones are energy degenerate. It means that we have
in this case supersymmetric quantum mechanics and also the addition of angular
momentum for massless particles. We review too the cases of two bosonic and
fermionic oscillators.

4
The categories of this paper are: cond-mat
2
The categories of this paper are: math
30
The categories of this paper are: q-alg
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
1
The categories of this paper are: cs
16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
35
The categories of this paper are: mtrl-th
7
The categories of this paper are: hep-th
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
22
The categories of this paper are: chao-dyn
33
The categories of this paper are: plasm-ph
20
The categories of this paper are: acc-phys