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The closedness of the generator of a semigroup
Journal article   Open access   Peer reviewed

The closedness of the generator of a semigroup

George Androulakis and Matthew Ziemke
Semigroup forum, v 93(3), pp 589-606
01 Dec 2016
url
https://arxiv.org/pdf/1503.07472View

Abstract

Mathematics Physical Sciences Science & Technology
We study semigroups of bounded operators on a Banach space such that the members of the semigroup are continuous with respect to various weak topologies and we give sufficient conditions for the generator of the semigroup to be closed with respect to the topologies involved. The proofs of these results use the Laplace transforms of the semigroup. Thus we first give sufficient conditions for Pettis integrability of vector-valued functions with respect to scalar measures.

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