Lipschitz stability in an inverse problem for the wave equation

We are interested in the inverse problem of the determination of the potential $p(x), x\inΩ\subset\mathbb{R}^n$ from the measurement of the normal derivative $\partial_νu$ on a suitable part $Γ_0$ of the boundary of $Ω$, where $u$ is the solution of the wave equation $\partial_{tt}u(x,t)-Δu(x,t)+p(x)u(x,t)=0$ set in $Ω\times(0,T)$ and given Dirichlet boundary data. More precisely, we will prove local uniqueness and stability for this inverse problem and the main tool will be a global Carleman estimate, result also interesting by itself.

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