Suppose that for . Prove that for all R, where M(r):=sup{|f(z)|:|z|=r}.
I have absolutely no idea where to start with this question. Help starting would be much appreciated.
Suppose that for . Prove that for all R, where M(r):=sup{|f(z)|:|z|=r}.
I have absolutely no idea where to start with this question. Help starting would be much appreciated.