Hille–Yosida type theorems for local regularized semigroups and local integrated semigroups
Tom 152 / 2002
Studia Mathematica 152 (2002), 45-67
MSC: Primary 47D06; Secondary 47B40.
DOI: 10.4064/sm152-1-4
Streszczenie
Motivated by a great deal of interest recently in operators that may not be densely defined, we deal with regularized semigroups and integrated semigroups that are either not exponentially bounded or not defined on $[0, \infty )$ and generated by closed operators which may not be densely defined. Some characterizations and related examples are presented. Our results are extensions of the corresponding results produced by other authors.
