QUALITATIVE SYMMETRIC DIFFERENTIATION

Michael J. Evans; Robert W. Vallin

doi:10.2307/44152307

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Home > Journals > Real Anal. Exchange > Volume 18 > Issue 2 > Article

1992/1993 QUALITATIVE SYMMETRIC DIFFERENTIATION

Michael J. Evans, Robert W. Vallin

Real Anal. Exchange 18(2): 575-585 (1992/1993). DOI: 10.2307/44152307

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Abstract

It is shown that the set of points at which a real valued function of a real variable is qualitatively continuous and finitely qualitatively symmetrically differentiable but not qualitatively differentiable is a $\sigma$ -symmetrically porous set.

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Michael J. Evans. Robert W. Vallin. "QUALITATIVE SYMMETRIC DIFFERENTIATION." Real Anal. Exchange 18 (2) 575 - 585, 1992/1993. https://doi.org/10.2307/44152307