Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Generalization of parity-time and partial parity-time symmetry   We show that parity-time and partial parity-time symmetries are particular
cases of antiunitary symmetry. This point is illustrated by means of a recently
discussed system of non-Hermitian coupled harmonic oscillators that also
exhibits other types of antiunitary symmetries. We also show that a combination
of group and perturbation theory is a useful tool for predicting broken
antiunitary symmetry.

33
The categories of this paper are: plasm-ph
6
The categories of this paper are: astro-ph
1
The categories of this paper are: cs
8
The categories of this paper are: hep-ex
19
The categories of this paper are: eess
12
The categories of this paper are: nucl-th
15
The categories of this paper are: nucl-ex
31
The categories of this paper are: ao-sci
27
The categories of this paper are: comp-gas
21
The categories of this paper are: adap-org
36
The categories of this paper are: cmp-lg
34
The categories of this paper are: chem-ph
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
5
The categories of this paper are: gr-qc
18
The categories of this paper are: econ