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Re: Cardinality of equivalence classes and measure

Subject: Re: Cardinality of equivalence classes and measure
From: "eugene"
Date: 31 Oct 2006 12:17:51 -0800
Newsgroups: sci.math
Butch Malahide wrote:
> eugene wrote:
> > Could you please explain how are you going to choose c disjoint
> > non-measurable sets.
>
> Use transfinite induction to construct c disjoint sets X_t, each having
> nonempty intersection with every closed set of positive measure. This
> can be done because there are only c closed sets of positive measure,
> and every such set contains c points. (That should be enough of a hint
> if you're familiar with transfinite induction; if not, I could provide
> more details.)

Could you please provide more details ? I know what a transfinite
induction is, but i've never

used it on my own and am not able to apply it in our case.

Thanks.

>Now X_t is nonmeasurable because neither it nor its
> complement contains a closed set of positive measure.


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