Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Pullbacks of hyperplane sections for Lagrangian fibrations are primitive   Let p: M -> B be a Lagrangian fibration on a hyperkahler manifold of maximal
holonomy (also known as IHS), and H the generator of the Picard group of B. We
prove that the pullback $p^*(H)$ is a primitive class on M.

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The categories of this paper are: econ
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The categories of this paper are: atom-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: cs
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The categories of this paper are: mtrl-th
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: hep-lat
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The categories of this paper are: bayes-an
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The categories of this paper are: nlin
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The categories of this paper are: gr-qc
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The categories of this paper are: q-alg
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The categories of this paper are: solv-int
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The categories of this paper are: astro-ph
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The categories of this paper are: hep-ex
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The categories of this paper are: patt-sol