Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Gauge Symmetries and Noether Charges in Clebsch-Parameterized
  Magnetohydrodynamics   It is shown that the Clebsch parameterization, upon canonizing the
Hamiltonian system of ideal fluid or plasma dynamics, converts the Casimir
invariants (mass and helicities) in the original noncanonical formulation into
the Noether charges pertinent to the gauge symmetries of the parameterization.
The problem is addressed in the context of magnetohydrodynamics. The concrete
forms of the gauge symmetries of Clebsch parameterization are worked out.

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The categories of this paper are: hep-ph
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The categories of this paper are: nucl-ex
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The categories of this paper are: ao-sci
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The categories of this paper are: eess
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: hep-lat
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The categories of this paper are: atom-ph
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The categories of this paper are: funct-an
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: solv-int
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The categories of this paper are: q-bio
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The categories of this paper are: comp-gas
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The categories of this paper are: alg-geom
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The categories of this paper are: nucl-th