Abstract
In this paper we study a second order semilinear initial value
problem (IVP), where the linear operator in the differential equation is
the infinitesimal generator of a strongly continuous cosine family in a
Banach space
In this paper we study a second order semilinear initial value
problem (IVP), where the linear operator in the differential equation is
the infinitesimal generator of a strongly continuous cosine family in a
Banach space