Abstract
We consider the partial data inverse boundary problem for the Schrödinger operator at a frequency k>0 on a bounded domain in Rn, n≥3, with impedance boundary conditions. Assuming that the potential is known in a neighborhood of the boundary, we first show that the knowledge of the partial Robin–to–Dirichlet map at the fixed frequency k>0 along an arbitrarily small portion of the boundary, determines the potential in a logarithmically stable way. We prove, as the principal result of this work, that the logarithmic stability can be improved to the one of Hölder type in the high frequency regime.
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