Measure Theory (13/15) - Lebesgue outer measure and Lebesgue measure on the real line (1/2)
From Joel Feinstein
The definition of Lebesgue outer measure λ* on the real line in terms of coverings by suitable sequences of half-open intervals.
We will see in Section 3.9 (assuming the axiom of choice) that Lebesgue outer measure is NOT a measure on the set of all subsets of the real line.
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