Preiss, D.; Zajicek, L. On the symmetry of approximate Dini derivates of arbitrary functions. (English) Zbl 0513.26004 Commentat. Math. Univ. Carol. 23, 691-697 (1982). Page: −5 −4 −3 −2 −1 ±0 +1 +2 +3 +4 +5 Show Scanned Page MSC: 26A27 Nondifferentiability (nondifferentiable functions, points of nondifferentiability), discontinuous derivatives Keywords:approximate Dini derivates; sigma-porous sets Citations:Zbl 0487.26004 PDFBibTeX XMLCite \textit{D. Preiss} and \textit{L. Zajicek}, Commentat. Math. Univ. Carol. 23, 691--697 (1982; Zbl 0513.26004) Full Text: EuDML