The purpose of this paper is to give a new proof of the following Lusin's theorem: Théorème: If f(x) is a measurable function defined on the interval I: 0 ≤ x ≤ 1, then for every ϵ > 0 there is a set A ⊂ I such that f(x) is continuous on A and m(I-A) < ϵ.
@article{bwmeta1.element.bwnjournal-article-fmv9i1p12bwm, author = {Leon Cohen}, title = {A new proof of Lusin's theorem}, journal = {Fundamenta Mathematicae}, volume = {10}, year = {1927}, pages = {122-123}, zbl = {53.0242.03}, language = {en}, url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-fmv9i1p12bwm} }
Cohen, Leon. A new proof of Lusin's theorem. Fundamenta Mathematicae, Tome 10 (1927) pp. 122-123. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-fmv9i1p12bwm/