Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: On nef reductions of projective irreducible symplectic manifolds   Let X be a projective irreducible symplectic manifold and L a non trivial nef
divisor on X. Assume that the nef dimension of L is strictly less than the
dimension of X. We prove that L is semiample

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The categories of this paper are: cs
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The categories of this paper are: nlin
12
The categories of this paper are: nucl-th
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The categories of this paper are: alg-geom
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The categories of this paper are: gr-qc
34
The categories of this paper are: chem-ph
33
The categories of this paper are: plasm-ph
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The categories of this paper are: cond-mat
37
The categories of this paper are: supr-con
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The categories of this paper are: q-fin
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: hep-lat
18
The categories of this paper are: econ
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex