International Journal of Mathematics and Mathematical Sciences
Volume 10 (1987), Issue 4, Pages 825-827

An inverse problem for Helmholtz's equation

A. G. Ramm

Mathematics Department, Kansas State University, Manhattan 66506, KS, USA

Received 20 March 1987

Copyright © 1987 A. G. Ramm. 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 refraction coefficient in Helmholtz's equation is found from the knowledge of a family of the solutions to this equation on two lines.