Stupina, I. D. Some properties of \(R\)- and \(R^ c\)-operations. (Russian) Zbl 0209.01901 Dokl. Akad. Nauk SSSR 188, 1010-1013 (1969). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 03E99 Set theory PDFBibTeX XMLCite \textit{I. D. Stupina}, Dokl. Akad. Nauk SSSR 188, 1010--1013 (1969; Zbl 0209.01901)