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We explain how to build invisible isotropic conductivity perturbations of theunit conductivity in the framework of the point electrode model fortwo-dimensional electrical impedance tomography. The theoretical approach,based on solving a fixed point problem, is constructive and allows theimplementation of an algorithm for approximating the invisible perturbations.The functionality of the method is demonstrated via numerical examples.

Construction of invisible conductivity perturbations for the point electrode model in electrical impedance tomography