Suppose U is a positive harmonic function which is defined everywhere in the plane. Show that U must be a constant function.
This is a question regarding Poisson Integral Formula in PDE. I need to find it using the Harnak's inequalities.© BrainMass Inc. brainmass.com August 15, 2018, 1:01 am ad1c9bdddf
A harmonic function is shown to be a constant function. The solution is detailed and well presented. The response received a rating of "5/5" from the student who originally posted the question.