A Short Proof of Johnson's Uniqueness‐of‐Norm Theorem
A Short Proof of Johnson's Uniqueness‐of‐Norm Theorem
复制标题
约翰逊范数唯一性定理的简短证明
DOI:
10.1112/blms/21.5.487
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发表时间:
1989
影响因子:
0.9
通讯作者:
T. Ransford
中科院分区:
文献类型:
--
作者:
T. Ransford
Let B be a (complex, unital) Banach algebra. The radical of B, denoted by Rad (B), is the intersection of all the maximal left ideals of B. In [2], BE Johnson proved that if Rad (B)={0}, then any other Banach algebra norm on B is necessarily equivalent to the given one. In fact he proved the following stronger result.