On the Adjoint of a Strongly Continuous Semigroup
Diómedes Bárcenas and Luis Gerardo Mármol
Source: Abstr. Appl. Anal. Volume 2008
(2008), Article ID
651294, 11 pages.
Abstract
Using some techniques from vector integration, we prove the weak measurability of the adjoint of strongly continuous semigroups which factor through Banach spaces without isomorphic copy of ${l}_{1} $; we also prove the strong continuity away from zero of the adjoint if the semigroup factors through Grothendieck spaces. These results are used, in particular, to characterize the space of strong continuity of ${\{{T}^{{\ast}{\ast}}(t)\}}_{t\geq{}0}$, which, in addition, is also characterized for abstract $L$- and $M$-spaces. As a corollary, it is proven that abstract $L$-spaces with no copy of ${l}_{1} $ are finite-dimensional.
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Links and Identifiers
Permanent link to this document: http://projecteuclid.org/euclid.aaa/1220969148
Digital Object Identifier: doi:10.1155/2008/651294
Mathematical Reviews number (MathSciNet): MR2393113
Zentralblatt MATH identifier: 1165.47026
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Abstract and Applied Analysis
