给出一类不可分解的∑e^1型Banach空间上有界线性算子的谱的特殊结构.证明了存在某个∑e^1型Banach空间使其上某个(B)型良有界算子丁的谱σ(T)是可数无限集.
Gives the special structure of the spectrum of bounded linear operators on a class of indecomposable ∑e^1 type Banach spaces ; shows that there is a ∑e^1 type Banach space on which there is a well-bounded operator of type (B) such that the spectrum of it is the infinite countable set.