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The unramified Brauer groups of normic bundles

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arxiv 2211.07054 v1 pith:GRYTWQEJ submitted 2022-11-14 math.AG math.NT

classification math.AGmath.NT
keywords brauergroupunramifiedbundlescoincidescompactificationcomputeetale
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We produce a partial compactification of the variety given by P(t)=N_{K/k}(\mathbf z) whose Brauer group coincides with the unramified Brauer group, where K is an \'etale k-algebra and P(t)\in k[t] is a nonconstant polynomial. Then we obtain a systematic method to compute the unramified Brauer group for all such varieties.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Varieties with prescribed finite unramified Brauer groups and subgroups precisely obstructing the Hasse principle

    math.NT 2025-04 conditional novelty 8.0 of 10

    For any finite abelian groups B0 ⊂ B, there exists a smooth rationally connected variety over a number field whose unramified Brauer group is B and whose Hasse principle obstruction is precisely B0.

  2. Vertical unramified Brauer groups of Galois normic bundles

    math.NT 2025-12 conditional novelty 6.0 of 10

    For Galois normic bundles N_{K/k}(z)=P(x), the vertical unramified Brauer group is isomorphic to an explicit quotient of character groups determined by the Galois group G and the multiplicities of the irreducible fact...

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