抽象Cauchy问题的（n，k）－适定性

The(n,k)-Wellposedness of Cauchy Problem

本文在生成元非稠定的情况下讨论了抽象Ｃａｕｃｈｙ问题的（ｎ，ｋ）－适定性与积分半群的关系。

Abstract In the case that the generator is not densely defined,this paper studies the relations between the(n,k)-wellposedness of abstract Cauchy problem and n-times integrated semigroups.