Measure (mathematics)
Monotonicity

If E 1 {\displaystyle E_{1}} and E 2 {\displaystyle E_{2}} are measurable sets with E 1 ⊆ E 2 {\displaystyle E_{1}\subseteq E_{2}} then μ (E 1) ≤ μ (E 2). {\displaystyle \mu (E_{1})\leq \mu (E_{2}).}
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