Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Meanders and Reconnection-Collision Sequences in the Standard Nontwist
  Map   New global periodic orbit collision/separatrix reconnection scenarios in the
standard nontwist map in different regions of parameter space are described in
detail, including exact methods for determining reconnection thresholds that
are implemented numerically. The results are compared to a break-up diagram of
shearless invariant curves. The existence of meanders (invariant tori that are
not graphs) is demonstrated numerically for both odd and even period
reconnection for certain regions in parameter space, and some of the
implications on transport are discussed.

35
The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
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The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
7
The categories of this paper are: hep-th
37
The categories of this paper are: supr-con
12
The categories of this paper are: nucl-th
28
The categories of this paper are: alg-geom
14
The categories of this paper are: math-ph
21
The categories of this paper are: adap-org
13
The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: dg-ga
18
The categories of this paper are: econ