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| | Vitali set (Site not responding. Last check: 2007-10-22) |
 | | The set [0,1]∪[2,3] is composed of two intervals of length one, so we take its total length to be 2. |
 | | In this setting, the Lebesgue measure, which assigns weight b-a to the interval [a,b] will assign weight 0 to the set of rational numbers. |
 | | By the axiom of choice, we are able to choose a set V⊂[0, 1] such that for any equivalence class [x], the set V∩[x] is a singleton, that is, a set consisting of exactly one point. |
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