Geodesic
An elementary proof of the one-dimensional Rademacher theorem
Mathematica Bohemica, Tome 117 (1992) no. 2, pp. 133-136.

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An elementary short proof of the one-dimensional Rademacher theorem on differentiability of Lipschitz functions is given.
DOI : 10.21136/MB.1992.125906
Classification : 26A24
Keywords: differentiability almost everywhere; Dini derivatives; Rademacher theorem; Lipschitz function; derivative 
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Zajíček, Luděk. An elementary proof of the one-dimensional Rademacher theorem. Mathematica Bohemica, Tome 117 (1992) no. 2, pp. 133-136. doi : 10.21136/MB.1992.125906. http://geodesic.mathdoc.fr/articles/10.21136/MB.1992.125906/

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