Claims

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1967_09_01_wirsing: Wirsing proves that every multiplicative function with values in plus and minus one has a mean value, answering the question affirmatively; refereed in Acta Mathematica Academiae Scientiarum Hungaricae, September 1967.

1968_09_01_halasz: Halász determines the asymptotic behavior of the partial sums of every multiplicative function of modulus at most one, which for real-valued functions gives the mean value; refereed in Acta Math. Acad. Sci. Hungar., 1968.

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