Zygmund, Antoni On the summability of multiple Fourier series. (English) Zbl 0034.04601 Am. J. Math. 69, 836-850 (1947). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 2 Documents Keywords:Approximation and series expansion PDFBibTeX XMLCite \textit{A. Zygmund}, Am. J. Math. 69, 836--850 (1947; Zbl 0034.04601) Full Text: DOI