B. Barcelo et al., THE INVERSE CONDUCTIVITY PROBLEM WITH ONE MEASUREMENT - UNIQUENESS FOR CONVEX POLYHEDRA, Proceedings of the American Mathematical Society, 122(1), 1994, pp. 183-189
Let OMEGA denote a smooth domain in R(n) containing the closure of a c
onvex polyhedron D. Set chi(D) equal to the characteristic function of
D. We find a flux g so that if u is the nonconstant solution of div (
(1 + chi(D))delu) = 0 in OMEGA with partial derivative u/partial deriv
ative n = g on partial derivative OMEGA, then D is uniquely determined
by the Cauchy data g and f = u/partial derivative OMEGA.