This issuePrevious ArticleOn the boundedness of solutions of the equation
$u''+(1+f(t))u=0$Next ArticleCenter-stable manifolds for differential equations with state-dependent delays
Perturbation of the
exponential type of linear nonautonomous
parabolic equations and applications to nonlinear equations
In this paper we give some sharp qualitative and quantitative
conditions to guarantee that the exponential type of a linear
nonautonomous equation is modified by a linear perturbation. No
assumption (periodic, almost periodic, quasi periodic etc) is made on
the time behavior of the coefficients of the
equation or the perturbation.
The results are applied to the study of the asymptotic behavior, both
forwards and pullback, of nonautonomous nonlinear equations.