Figure 16From: Internal feedback stabilization of multi-dimensional wave equations with a boundary delay: a numerical studyThe energy \(E(t)\) of the wave system (1.16)-(1.20) with \(a(x)=e^{(x_{1} x_{2})}\) and for different delays when: a) \(k=0.4\); b) \(k=-0.4\); c) \(k=1\); d) \(k=-1\)Back to article page