Fri, 03 Mar 2017
14:30
C5

Ultraproducts and Spec (^Z)

Paola D'Aquino
(Naples)
Abstract

We give a description of the spectra of $\hat{\mathbb Z}$ and of the
finite adeles using  ultraproducts. In describing the prime ideals and the
localizations, ultrapowers of the group $\mathbb Z$ and ultraproducts of
rings of $p$-adic integers are used.

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