Sur le fonction de Bieberbach-Eilenberg satisfaisant à deux au moins équations du type de Schiffer

On functions satisfying more than one equation of Schiffer type

“…The same problems for the classes S 1 and B were investigated by one of the present authors in [7] and [4], by Jakubowski and Majchrzak in [3] and by Starkov in [8]. It turned out that not all the properties of the functions in ( * ) were in fact used in the derivation of the majority of the results of [7] and [4]. The aim of this paper is to investigate functions satisfying two independent equations of the form ( * ) under weaker assumptions on P (w) and Q(z).…”