Evaluating the wild Brauer group
Evaluating the wild Brauer group
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评估野生布劳尔群
DOI:
10.1007/s00222-023-01210-8
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发表时间:
2023
影响因子:
3.1
通讯作者:
Bright M
中科院分区:
文献类型:
--
作者:
Bright M
Classifying elements of the Brauer group of a varietyover a-adic field by the-adic accuracy needed to evaluate them gives a filtration on. We relate this filtration to that defined by Kato’s Swan conductor. The refined Swan conductor controls how the evaluation maps vary on-adic discs: this provides a geometric characterisation of the refined Swan conductor. We give applications to rational points on varieties over number fields, including failure of weak approximation for varieties admitting a non-zero global 2-form.
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DOI:
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