摘要
本文给出了一个M-亚正常算子的充要条件;在一些条件下,证明了一类特殊的函数演算关于M-亚正常算子保持谱的映射性质;还给出了一些算子正常化的条件。
In this paper, some problems on M-hyponormal operators are discussed. A nece-ssary and sufficient condition for T to be an M-hyponormal operator is obtained. IfT is an M-hyponormal operator, then it is proved that a special class of functionaltransformations keeps spectral mapping.This paper also gives some conditions un-der which operator T is a normal operator.
出处
《复旦学报（自然科学版）》
CAS
CSCD
北大核心
1989年第2期141-147,共7页
Journal of Fudan University：Natural Science
