© 2015, Allerton Press, Inc. We consider solution f to a linear elliptic differential equation of second order, and prove that it vanishes if zeros of f condense to two points along non-collinear rays. The requirement of ...

© 2017, Allerton Press, Inc.The interior uniqueness theorem for analytic functions was generalized by M. B. Balk to the case of polyanalytic functions of order n. He proved that if the zeros of a polyanalytic function have ...