Abstract
On etudie la propriete de decroissance des solutions des equations d'onde dissipatives non lineaires de la forme: ∂ 2 u/∂t 2 -Δu+g(∂u/∂t)=f(x,t), (x,t)∈Ω×R + avec les conditions u(x,o)=u 0 (x), u t (x,o)=u 1 (x), x∈Ω et u(x,t)=0 sur ∂Ω×R + , ou Ω est un domaine borne de R n avec une frontiere lisse ∂Ω et g(v) est une fonction du genre k/v/ α v,k>o,α≥o
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