利用算子谱的精密结构的分析方法,给出算子S和T拟相似时Kato本质谱σk(S)的一个连通分支与σk(T)相交的充分条件和充要条件,同时证明了Browder本质谱σB(S)的每一个连通分支与Kato本质谱σk(T)的某些子集的交集是非空的.
Applying the elaborate structure of the spectrum of operators, for two quasisimilar operators S and T, this paper gives some sufficient and necessary conditions under which a component of Kato Essential Spectrum σk(S) intersects with σk(T), and proves that each component of Browder Essential Spectrum σk(S) intersects with some subsets of σk(T).