发表于2025-01-30
Ultrametric Banach Algebras 2025 pdf epub mobi 电子书
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In this book, ultrametric Banach algebras are studied with the help of topological considerations, properties from affinoid algebras, and circular filters which characterize absolute values on polynomials and make a nice tree structure. The Shilov boundary does exist for normed ultrametric algebras.The spectral norm is equal to the supremum of all continuous multiplicative seminorms whose kernel is a maximal ideal. Two different such seminorms can have the same kernel. Krasner-Tate algebras are characterized among Krasner algebras, affinoid algebras, and ultrametric Banach algebras. Given a Krasner-Tate algbebra A=K{t} x], the absolute values extending the Gauss norm from K{t} to A are defined by the elements of the Shilov boundary of A.
Ultrametric Banach Algebras 2025 pdf epub mobi 电子书