摘要
通过两个具体算子的讨论,说明Mohebi-Radjabalipour引理中的条件″ran(λ-T)不是X中的闭集″不能替换成更弱的条件″ran(λ-T)不是Fredholm算子″.
We provide two operators from which we see that the hypothesis in the Mohebi- Radjabalipour Lemma that "ran(λ-T)is not closed in X"can not be replaced by the weaker condition that " λ- T is not Fredholm operator".
出处
《应用泛函分析学报》
CSCD
2008年第2期97-99,共3页
Acta Analysis Functionalis Applicata
基金
the Natural Science Foundation of P.R.China(10771039)