Let be a domain in for . Then the transformation
onto a domain , where
is called a Kelvin transformation. If is a harmonic function on , then is also harmonic on .
Let be a domain in for . Then the transformation
onto a domain , where
is called a Kelvin transformation. If is a harmonic function on , then is also harmonic on .
Weisstein, Eric W. "Kelvin Transformation." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/KelvinTransformation.html