Ultrametric Banach Algebras

ISBN: 9789812381941

出版社: World Scientific Publishing Company

出版年: 2003-03

页数: 275

定价: 506.00元

装帧: Hardcover

内容简介

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.