On a harmonic measure
The author constructs a nonzero \(\sigma\)-finite measure on a separable Hilbert space that is a solution of an infinite-dimensional analogue of Laplace equation [differentiability of measures is understood in the sense of \textit{V. I. Averbukh, O. G. Smolyanov} and \textit{S. V. Fomin}, Tr. Mosk. Mat. 0-va 24, 133-174 (1971; Zbl 0234.28005)].
\(\sigma\)-additive measure of unbounded variation on a Hilbert space
infinite-dimensional analogue of Laplace equation
scientific article; zbMATH DE number 4071265