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I am told that by means of continued fractions, Lusin or somebody else, has constructed examples of Lebesque measurable sets which are not Borel measurable. Please, if you know a reference help me.

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closed as too localized by Zev Chonoles, Andreas Blass, Simon Thomas, Mark Meckes, George Lowther Jun 13 '12 at 15:41

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MathOverflow is for research-level questions only, see the FAQ: Here is a thread on Math Stack Exchange where this topic is addressed: – Zev Chonoles Jun 13 '12 at 14:14
@jorge: Google search gives lot of good results. Here is one which I liked:… – S.C. Jun 13 '12 at 15:09
@Chandra: But that is not what he is asking for... – Gerald Edgar Jun 13 '12 at 15:38

See this this post from long ago

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