a1 Department of Mathematics Education, Yeungnam University, 214-1 Daedong, Gyongsan 712-749, Korea (email@example.com)
a2 Department of Mathematics, Graduate School of Science, Hiroshima University, Higashi-Hiroshima 739-8526, Japan (firstname.lastname@example.org)
A sharp norm estimate will be given to the pre-Schwarzian derivatives of close-to-convex functions of specified type. In order to show the sharpness, we introduce a kind of maximal operator which may be of independent interest. We also discuss a relation between the subclasses of close-to-convex functions and the Hardy spaces.
(Received April 28 2004)