Continuous Semigroups in Banach Algebras

Download or read book Continuous Semigroups in Banach Algebras written by Allan M. Sinclair and published by Cambridge University Press. This book was released on 1982-06-17 with total page 153 pages. Available in PDF, EPUB and Kindle. Book excerpt: In these notes the abstract theory of analytic one-parameter semigroups in Banach algebras is discussed, with the Gaussian, Poisson and fractional integral semigroups in convolution Banach algebras serving as motivating examples. Such semigroups are constructed in a Banach algebra with a bounded approximate identity. Growth restrictions on the semigroup are linked to the structure of the underlying Banach algebra. The Hille-Yosida Theorem and a result of J. Esterle's on the nilpotency of semigroups are proved in detail. The lecture notes are an expanded version of lectures given by the author at the University of Edinburgh in 1980 and can be used as a text for a graduate course in functional analysis.