Copyright © 2009 Guochun Wen et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
The present paper deals with the inverse problem for linear elliptic equations of second order from Dirichlet to Neumann map in multiply connected domains. Firstly the formulation and
the complex form of the problem for the equations are given, and then the existence and global
uniqueness of solutions for the above problem are proved by the complex analytic method, where
we absorb the advantage of the methods in previous works and give some improvement and development.