O’Malley, Richard J. The set where an approximate derivative is a derivative. (English) Zbl 0279.26005 Proc. Am. Math. Soc. 54, 122-124 (1976). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page Cited in 1 Document MSC: 26A24 Differentiation (real functions of one variable): general theory, generalized derivatives, mean value theorems PDFBibTeX XMLCite \textit{R. J. O'Malley}, Proc. Am. Math. Soc. 54, 122--124 (1976; Zbl 0279.26005) Full Text: DOI