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Resolvent estimates and the decay of the solution to the wave equation with potential

Vladimir Georgiev — 2001

Journées équations aux dérivées partielles

We prove a weighted L estimate for the solution to the linear wave equation with a smooth positive time independent potential. The proof is based on application of generalized Fourier transform for the perturbed Laplace operator and a finite dependence domain argument. We apply this estimate to prove the existence of global small data solution to supercritical semilinear wave equations with potential.

L - L 2 weighted estimate for the wave equation with potential

Vladimir GeorgievNicola Visciglia — 2003

Atti della Accademia Nazionale dei Lincei. Classe di Scienze Fisiche, Matematiche e Naturali. Rendiconti Lincei. Matematica e Applicazioni

We consider a potential type perturbation of the three dimensional wave equation and we establish a dispersive estimate for the associated propagator. The main estimate is proved under the assumption that the potential V 0 satisfies V x C 1 + x 2 + ϵ 0 , where ϵ 0 > 0 .

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