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Two counterexamples to the spectral mapping theorem for semigroups of positive operators

✍ Scribed by Peter Takac

Publisher: SP Birkhäuser Verlag Basel
Year: 1986
Tongue: English
Weight: 312 KB
Volume: 9
Category: Article
ISSN: 0378-620X
DOI: 10.1007/bf01199354

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## Abstract We consider a class of abstract evolution problems characterized by the sum of two unbounded linear operators __A__ and __B__, where __A__ is assumed to generate a positive semigroup of contractions on an L^1^‐space and B is positive. We study the relations between the semigroup generat