Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Simplification in the proof presented for non existence of periodic
  solutions in time invariant fractional order systems   In this note, a short-cut is proposed to shorten the proof which has been
previously presented for non existence of periodic solutions in time invariant
fractional order systems.

36
The categories of this paper are: cmp-lg
17
The categories of this paper are: q-fin
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
34
The categories of this paper are: chem-ph
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
14
The categories of this paper are: math-ph
26
The categories of this paper are: bayes-an
1
The categories of this paper are: cs
25
The categories of this paper are: patt-sol
18
The categories of this paper are: econ
37
The categories of this paper are: supr-con
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci