Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some remarks on Brauer groups of K3 surfaces   We discuss the geometry of the genus one fibrations associated to an elliptic
fibration on a K3 surface. We show that the two-torsion subgroup of the Brauer
group of a general elliptic fibration is naturally isomorphic to the
two-torsion of the Jacobian of a curve associated to the fibration. We remark
that this is related to Recillas' trigonal construction. Finally we discuss the
two-torsion in the Brauer group of a general K3 surface with a polarisation of
degree two.

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The categories of this paper are: chem-ph
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The categories of this paper are: dg-ga
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The categories of this paper are: q-fin
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The categories of this paper are: patt-sol
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The categories of this paper are: bayes-an
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The categories of this paper are: chao-dyn
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The categories of this paper are: funct-an
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The categories of this paper are: comp-gas
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The categories of this paper are: cmp-lg
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The categories of this paper are: mtrl-th
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: stat
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The categories of this paper are: plasm-ph
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The categories of this paper are: solv-int