GES under point-wise dissipation for time-delay systems

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Let f0f_0 be the vector field of the autonomous time-delay system, Lipschitz on bounded sets, with f0(0)=0f_0(0)=0. Let V:Xn→R≥0V:\mathcal X^n\to\mathbb R_{\geq0} be a Lyapunov–Krasovskii functional (LKF), and let a‾,a‾,a>0\underline a,\overline a,a>0 satisfy, for every ϕ∈Xn\phi\in\mathcal X^n,

a‾∣ϕ(0)∣2≤V(ϕ)≤a‾∥ϕ∥2,\underline a|\phi(0)|^2\leq V(\phi)\leq\overline a\|\phi\|^2, D+V(ϕ,f0(ϕ))≤−a∣ϕ(0)∣2.D^+V(\phi,f_0(\phi))\leq-a|\phi(0)|^2.

GES under point-wise dissipation conjecture. Under these assumptions, the system is GES. The converse is known from the cited theorem, so the conjecture would characterize GES through point-wise dissipation without the additional growth-rate assumption currently required; its resolution is not supplied.

References

Primary source

Antoine Chaillet, Iasson Karafyllis, Pierdomenico Pepe and Yuan Wang, “The ISS framework for time-delay systems: a survey”, arXiv:2206.06167 (2022).

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