We address the stability issue in Calder'on's problem for a special class of
anisotropic conductivities of the form $sigma=gamma A$ in a Lipschitz domain
$Omegasubsetmathbb{R}^n$, $ngeq 3$, where $A$ is a known Lipschitz
continuous matrix-valued function and $gamma$ is the unknown piecewise affine
scalar function on a given partition of $Omega$. We define an ad-hoc misfit
functional encoding our data and establish stability estimates for this class
of anisotropic conductivity in terms of both the misfit functional and the more
commonly used local Dirichlet-to-Neumann map.
