weak observability 2dissipative operators 1energy decay 1evolution equations 1infinite-dimensional systems 1resolvent estimates 1skew-adjoint operators 1spectral coercivity 1stability 1wave equation 1
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math.OC2026
Energy decay and weak observability for some evolution systems
Kaïs Ammari, Faouzi Triki
The paper shows that, under suitable conditions, weak observability and energy decay are equivalent properties for a class of dissipative evolution operators, linking stability est…
math.OC2026
Weak Observability Characterization for Abstract Wave Equations
Nisrine Charaf, Faouzi Triki
The paper studies weak observability for abstract wave equations generated by skew‑adjoint operators, providing a spectral characterization via a new notion of spectral coercivity…