Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Weakly nonlinear dynamics in noncanonical Hamiltonian systems with
  applications to fluids and plasmas   A method, called beatification, is presented for rapidly extracting weakly
nonlinear Hamiltonian systems that describe the dynamics near equilibria for
systems possessing Hamiltonian form in terms of noncanonical Poisson brackets.
The procedure applies to systems like fluids and plasmas in terms of Eulerian
variables that have such noncanonical Poisson brackets, i.e., brackets with
nonstandard and possibly degenerate form. A collection of examples of both
finite and infinite dimensions is presented.

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The categories of this paper are: hep-ph
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The categories of this paper are: hep-lat
34
The categories of this paper are: chem-ph
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The categories of this paper are: adap-org
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The categories of this paper are: quant-ph
6
The categories of this paper are: astro-ph
8
The categories of this paper are: hep-ex
36
The categories of this paper are: cmp-lg
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The categories of this paper are: eess
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-th
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The categories of this paper are: alg-geom
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ
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The categories of this paper are: bayes-an
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The categories of this paper are: ao-sci