Markin M. V.
Ukr. Mat. Zh. - 2008. - 60, № 9. - pp. 1215 – 1233
Necessary and sufficient conditions for a scalar-type spectral operator in a Banach space to be a generator of a Carleman ultradifferentiable C0-semigroup are found. The conditions are formulated exclusively in terms of the spectrum of the operator.