On a Perturbation Theorem of Kaiser and Weis

Springer Science and Business Media LLC - Tập 70 - Trang 471-474 - 2005
Charles J. K. Batty1
1St. John’sCollege, Oxford OX1 3JP, England

Tóm tắt

We improve a perturbation theorem of C. Kaiser and L. Weis for semigroups of operators on Hilbert spaces by using a generation theorem of A.M. Gomilko, D.H. Shi and D.X. Feng.