Figure 11From: Internal feedback stabilization of multi-dimensional wave equations with a boundary delay: a numerical studyThe energy \(E(t)\) of the wave system without delay (3.18)-(3.21), when: a) \(a(x)=1\) and \(k=1\); b) \(a(x)=1\), and for \(k>0\); c) \(a(x)=1\), and \(k=-0.1\); d) \(k=1\), and for various \(a(x)\)Back to article page