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arxiv: 1802.06429 · v1 · pith:P5QEMJZZnew · submitted 2018-02-18 · 🧮 math.NT · math.AG

Cech cohomology and the Capitulation kernel

classification 🧮 math.NT math.AG
keywords capitulationcechcohomologykerneln-thsequenceassociatedcertain
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We discuss the capitulation kernel associated to a degree n covering using Cech cohomology and the Kummer sequence. The main result is a five-term exact sequence that relates the capitulation kernel to the Cech cohomology of the n-th roots of unity and a certain subquotient of the group of units modulo n-th powers.

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