Światak, Halina On some symmetrical equations of the form \(f_1 (x_1+\cdots +x_n) = \sum_{(i_1,\ldots,i_n)} f_1 (x_{i_1}) \cdots f_n (x_{i_n})\). (English) Zbl 0158.15301 Ann. Pol. Math. 19, 271-286 (1967). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents Keywords:functional analysis PDFBibTeX XMLCite \textit{H. Światak}, Ann. Pol. Math. 19, 271--286 (1967; Zbl 0158.15301) Full Text: DOI