Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Equivariant singularity analysis of the 2:2 resonance   We present a general analysis of the bifurcation sequences of 2:2 resonant
reversible Hamiltonian systems invariant under spatial $\Z_2\times\Z_2$
symmetry. The rich structure of these systems is investigated by a singularity
theory approach based on the construction of a universal deformation of the
detuned Birkhoff normal form. The thresholds for the bifurcations are computed
as asymptotic series also in terms of physical quantities for the original
system.

22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
32
The categories of this paper are: atom-ph
15
The categories of this paper are: nucl-ex
29
The categories of this paper are: funct-an
25
The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
12
The categories of this paper are: nucl-th
18
The categories of this paper are: econ
16
The categories of this paper are: stat
26
The categories of this paper are: bayes-an
6
The categories of this paper are: astro-ph
10
The categories of this paper are: q-bio