The growth bound for strongly continuous semigroups on Fr\'echet spaces

Abstract

We introduce the concepts of growth and spectral bound for strongly continuous semigroups acting on Fr\'echet spaces and show that the Banach space inequality $s(A)\leqslant\omega_0(T)$ extends to the new setting. Via a concrete example of an even uniformly continuous semigroup we illustrate that for Fr\'echet spaces effects with respect to these bounds may happen that cannot occur on a Banach space.