Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Canonical transformation for trapped/passing guiding-center orbits in
  axisymmetric tokamak geometry   The generating function for the canonical transformation from the parallel
canonical coordinates $(p_{\|},s)$ to the action-angle coordinates $(J,\zeta)$
for trapped/passing guiding-center orbits in axisymmetric tokamak geometry is
presented. Drawing on the analogy between the phase-space portraits of the
librating/rotating pendulum and the trapped/passing guiding-center orbits, the
generating function is expressed in terms of the Jacobi zeta function, which
can then readily be used to obtain an explicit expression for the bounce-center
transformation for trapped/passing-particles in axisymmetric tokamak geometry.

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The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
30
The categories of this paper are: q-alg
18
The categories of this paper are: econ
22
The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: bayes-an
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The categories of this paper are: math-ph
2
The categories of this paper are: math
23
The categories of this paper are: solv-int
12
The categories of this paper are: nucl-th
32
The categories of this paper are: atom-ph