▼	Set of symbols
▼	Alphabet
▼	Deduction system
▼	Theory
▼	Zermelo-Fraenkel set theory
▼	Set
▼	Binary cartesian set product
▼	Binary relation
▼	Binary endorelation
▼	Preordering relation
▼	Partial ordering relation
▼	Partially ordered set
▼	Interval
▼	Set of intervals
▼	J-interval
▼	N-interval
▼	Real N-interval
▼	Set of euclidean real intervals
▼	Elementary euclidean real set
▼	Elementary euclidean real partition
▼	Elementary euclidean real volume
▼	Elementary euclidean real volume function

▶	Jordan outer measure

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