证明了Σe^1型Banach空间X上黎斯算子类R(X)就等于非本性算子理想In(X),从而R(X)是B(X)中亏维为1的依算子范数闭的双侧理想;给出Σe1型Banach空间上良有界算子的一些性质.
Shows that R(X) , the class of Riesz operators, on a Σe^1 type Banach space is equal to In (X) , the ideal of inessential operators, so R(X) is a closed by operator norm , two-sided ideal in B(X) of co-dimension one; gives some properties of well-bounded operators on such spaces.