E-mail: jcp@arcade.mathematik.uni-freiburg.de
Abstract. By combining Tur\'an's proof of Fabry's gap theorem
with a gap theorem of P.
Sz\"usz we obtain a gap theorem which is more general then both these
theorems.
AMSclassification. 30A10, 30B10, 11N30.
Keywords. Gap theorems, lacunary series, power sum method.