Upper Semicontinuity Of Pullback Attractors For A Non-autonomous Viscoelastic Equation

This paper is concerned with upper semicontinuity of pullback attractors,for a non-autonomous viscoelastic equation with a past history with a nonautonomous per-turbation.(?)In particular,under some proper assumptions,we prove that,the pullback attractor{Aε(t)}t ∈R of Equation with ε>0 and the global attractor A of Equation with ε=0 satisfy lim ε→0+ distX(Aε(t),A)= 0 for any t ∈ R.