In this paper we improve an earlier result by Bukhgeim and Uhlmann We follow the general strategy of [1] but use a richer set of solutions to the Dirichlet problem. This implies a similar result for the problem of Electrical Impedance Tomography which consists in determining the conductivity of a body by making voltage and current measurements at the boundary.
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Kenig et al. (2007) studied this question.
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