Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Nilpotent orbits in classical Lie algebras over $\textbf{F}_{2^n}$ and
  the Springer correspondence   We give the number of nilpotent orbits in the Lie algebras of orthogonal
groups under the adjoint action of the groups over $\tF_{2^n}$. Let $G$ be an
adjoint algebraic group of type $B,C$ or $D$ defined over an algebraically
closed field of characteristic 2. We construct the Springer correspondence for
the nilpotent variety in the Lie algebra of $G$.

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The categories of this paper are: ao-sci
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The categories of this paper are: quant-ph
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-alg
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The categories of this paper are: eess
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
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The categories of this paper are: q-bio
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The categories of this paper are: nucl-th
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The categories of this paper are: math-ph
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The categories of this paper are: hep-th