EECT
Spectral analysis and exponential or polynomial stability of some indefinite sign damped problems
Farah Abdallah Denis Mercier Serge Nicaise
In this paper, we consider two damped wave problems for which the damping terms are allowed to change their sign. Using a careful spectral analysis, we find critical values of the damping coefficients for which the problem becomes exponentially or polynomially stable up to these critical values.
keywords: Indefinite damping spectral analysis. Riesz basis

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