Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Conforming Finite Element Discretization of the Streamfunction Form of
  the Unsteady Quasi-Geostrophic Equations   This paper presents a conforming finite element semi-discretization of the
streamfunction form of the one-layer unsteady quasi-geostrophic equations,
which are a commonly used model for large-scale wind-driven ocean circulation.
We derive optimal error estimates and present numerical results.

10
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: bayes-an
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The categories of this paper are: econ
5
The categories of this paper are: gr-qc
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The categories of this paper are: nucl-ex
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The categories of this paper are: math-ph
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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: supr-con
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The categories of this paper are: adap-org