Global stability for the multi-channel Gel'fand-Calder\'on inverse   problem in two dimensions
  We prove a global logarithmic stability estimate for the multi-channel Gel'fand-Calder\'on inverse problem on a two-dimensional bounded domain, i.e. the inverse boundary value problem for the equation $-\Delta \psi + v\, \psi = 0$ on $D$, where $v$ is a smooth matrix-valued potential defined on a bounded planar domain $D$. 
Matteo Santacesaria (CMAP)
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