The paper is concerned with the existence of almost periodic mild solutions to evolution equations
of the form u??(t)=Au (t)+f(t), where A generates a C- semigroup and f is almost periodic. Using the
evolution C-semigroup associated with the equation under consideration, we obtain various sufficient
conditions for the existence of almost periodic solutions to (*) which extend previous ones to a more general
class of ill-posed equations involving C-semigroups. ?? 2004 Elsevier Inc. All rights reserved.
