A B C D E F G H I J K L M N O P Q R S T U V W X Y Z All
Let C Denote the class of functions
f(z) = z + a8z2 + . . . + anzn + ...
which are regular in the unit disc E = {z||z| < 1} and map it onto a convex domain and let
sn(z,f) = z + a2z2+ ...anzn.