Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Strange nonchaotic attractors in driven delay--dynamics   Strange nonchaotic attractors (SNAs) are observed in quasiperiodically driven
time--delay systems. Since the largest Lyapunov exponent is nonpositive,
trajectories in two such identical but distinct systems show the property of
{\it phase}--synchronization. Our results are illustrated in the model SQUID
and R\"ossler oscillator systems.

32
The categories of this paper are: atom-ph
7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
10
The categories of this paper are: q-bio
15
The categories of this paper are: nucl-ex
0
The categories of this paper are: hep-ph
18
The categories of this paper are: econ
5
The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
16
The categories of this paper are: stat
19
The categories of this paper are: eess
20
The categories of this paper are: acc-phys
1
The categories of this paper are: cs
29
The categories of this paper are: funct-an