International Journal of Mathematics and Mathematical Sciences
Volume 20 (1997), Issue 4, Pages 823-824
doi:10.1155/S0161171297001129
Abstract
Let U be the unit disk, D⊃U an open connected set and z0∈D. Let also
P(z0,c,D) be the class of holomorphic functions in D for which f(z0)=c and Ref(z)>0 in U.
We find the extreme points of the class P(z0,c,D).