2002 | OriginalPaper | Buchkapitel
Linear Semigroups
verfasst von : George R. Sell, Yuncheng You
Erschienen in: Dynamics of Evolutionary Equations
Verlag: Springer New York
Enthalten in: Professional Book Archive
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In this chapter we describe the basic notions of a linear C0-semigroup and the related concepts of an infinitesimal generator. These concepts form infinite dimensional versions of solutions of the finite dimensional linear ordinary differential equation ə t x = Ax.In particular, the C0-semigroup corresponds to the solution operator or the fundamental solution matrix, and the infinitesimal generator corresponds to the linear coefficient matrix A. We will see that the C0-semigroups are linear prototypes of the semiflows described in Chapter 2.