Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Geometrical Modelling of Fluids   The paper considers the nonlinear electrodynamics type model and its relation
with relativistic hydrodynamics with no dissipation (including string and
membrane hydrodynamics). We are able to convert arbitrary flux of fluid to the
family of geodesics by the conformal transformation of metric. The conditions
of transformation of nonlinear electrodynamics solution to linear
electrodynamics solution by changing of metric are presented.

24
The categories of this paper are: dg-ga
29
The categories of this paper are: funct-an
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The categories of this paper are: supr-con
11
The categories of this paper are: hep-lat
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The categories of this paper are: stat
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
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The categories of this paper are: adap-org
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The categories of this paper are: chem-ph
4
The categories of this paper are: cond-mat
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The categories of this paper are: astro-ph
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The categories of this paper are: q-fin
31
The categories of this paper are: ao-sci
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The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an