Lebesgue Outer Measure of $\mathbb Q$ from the Definition
67637
How come $\lambda(\mathbb{Q})= \inf\left\{\sum_{n \ge 1} \lambda([a_n,b_n)) : \mathbb{Q} \subset \bigcup_{n \ge 1} [a_n,b_n)\right\} = 0$?
87216
Lebesgue non-measurable function
60032
If the measure of union = sum of outer measures, then the sets are measurable
35713
Let $X\subset \mathbb{R}$ Lebesgue measurable, $|X|<|\mathbb{R}|$, is it true that $X$ is null?
126227
continuity of a probability measure if $\mu (\{x\})=0$
79974
The cardinality of Lebesgue sets
94980
Measurable functions in a countable co-countable $\sigma$-algebra
58347
$L^p$ spaces and counting measure
138055
If $A$ has a positive Lebesgue measure then there exist subsets which are not measurable
130981
Co-countable measure on uncountable set
98200
$E$ Lebesgue measurable implies $E^2$ Lebesgue measurable?
145039
Algebraic independence over $\overline{\mathbb Q}$ and over $\mathbb Q$
156176
Lebesgue measurability of nearly identical sets
40785
Finite signed measures and their boundedness
68490
For $x\in\mathbb R\setminus\mathbb Q$, the set $\{nx-\lfloor nx\rfloor: n\in \mathbb{N}\}$ is dense on $[0,1)$
82464
$U^*\otimes V$ versus $L(U,V)$ for infinite dimensional spaces
98580
Lebesgue-measurable sets requiring the Axiom of Choice to construct