Re: Sets of measure 0 question...

William Elliot wrote:

What you wrote makes no sense to me. Each one of my A_n's is a set of
intervals of R. So, what do you mean by sum_j |A_j|?


sum(j=1,oo) |Aj|
[Aj] typo for |Aj|


No progress here. I had no doubt that sum_j meant sum(j = 1,oo). My
question is: what is |A_j|? After all, A_j is a set of intervals of R.

IIRC, |A_j| is the length of the interval. 

For the *fourth* time already: A_j is *not* an interval; it's a
set of intervals! So, what do you mean by |A_j|?

Best regards,

Jose Carlos Santos
.