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Katznelson-Tzafriri type theorems for individual solutions of evolution equations
Authors:Nguyen Van Minh
Affiliation:Department of Mathematics, University of West Georgia, Carrollton, Georgia 30118
Abstract:In this paper we present an extension of the Katznelson-Tzafriri Theorem to the asymptotic behavior of individual solutions of evolution equations $ u'(t) =Au(t)+f(t)$. The obtained results do not require the uniform continuity of solutions as well as the well-posedness of the equations. The method of study is based on a recently developed approach to the spectral theory of functions that is direct and free of $ C_0$-semigroups.

Keywords:Katznelson-Tzafriri Type Theorem   reduced spectrum of a function   asymptotic behavior
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