Hamedani, G. G.; S. Key, Eric; Volkmer, Hans - In: Statistics & Probability Letters 69 (2004) 1, pp. 1-9
The main result of the paper completely characterizes all continuous complex-valued functions [phi](t) with domain or satisfying[phi](t)=([phi](a1t))[gamma]1=([phi](a2t))[gamma]2,where a1[not equal to]1, a2[not equal to]1, [gamma]1,[gamma]2 are positive numbers with irrational log a1/log a2.
