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On a problem of Kahane about the image of Gaussian Taylor series. (English) Zbl 0627.60048

An answer is given to a question posed by J. P. Kahane [Some random series of functions (1968; Zbl 0192.538)] about Gaussian Taylor series, i.e. power series of the form \(F(z)=\sum^{\infty}_{n=0}a_ nZ_ nz^ n\) where \(a_ n\) is a series of positive constants satisfying certain conditions and \(\{Z_ n\}\) is a sequence of independent complex normals in standard form.
It is shown that if \(\sum a^ 2_ n\) diverges then F(z) takes a.s. every complex value with at most one exception. An extension is given, some conjectures noted and the differences between Gaussian and classical Taylor series illustrated by an example.
Reviewer: E.McKenzie

MSC:

60G15 Gaussian processes
60G50 Sums of independent random variables; random walks

Citations:

Zbl 0192.538
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