摘要
The authors prove that an operator with the cellular indecomposable property has no singular points in the semi-Fredholm domain, by applying the 4 x 4 matrix model of semi-Fredholm operators due to Fang in 2004. This result fills a gap in the result of Olin and Thomson in 1984.
基金
Project supported by the National Natural Science Foundation of China(No.11101312)
the National Science Foundation(No.0801174)
