Brown, Morton The monotone union of open \(n\)-cells is an open \(n\)-cell. (English) Zbl 0103.39305 Proc. Am. Math. Soc. 12, 812-814 (1961). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 67 Documents MathOverflow Questions: Manifolds with two coordinate charts Keywords:topology PDFBibTeX XMLCite \textit{M. Brown}, Proc. Am. Math. Soc. 12, 812--814 (1961; Zbl 0103.39305) Full Text: DOI