International Journal of Mathematics and Mathematical Sciences
Volume 12 (1989), Issue 2, Pages 385-390
Kelvin principle for a class of singular equations
1Faculty of Science, University of Ankara, Besevler, Ankara, Turkey
2Department of Mathematics, Florida State University, Tallahassee 32306, Florida, USA
Received 7 September 1988
Copyright © 1989 Abdullah Altin and Eutiquio C. Young. 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 classical Kelvin principle concerns invariance of solutions of the Laplace equation with respect to inversion in a sphere. By employing a hyperbolic-polar coordinate system, the principle is extended to cover a class of singular equations, which include the ultrahyperbolic equation.