Uniform exponential energy decay of wave equations in a bounded region with L2(0, ∞; L2 (Γ))-feedback control in the Dirichlet boundary conditions

Etant donne un ouvert borne Ω⊂R n , n≥2, on considere l'equation d'onde: W tt =ΔW dans (O,∞)×Ω, avec des conditions initiales W(o,x)=w o (x)∈L 2 (Ω), w 1 (o,x)=w 1 (x)∈H −1 (Ω), et des conditions aux limites non homogenes de type Dirichlet w(t,σ)≡u(t,σ) sur (o,∞)×Γ, Γ etant la frontiere de Ω

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