ℝ
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See also: Appendix:Variations of "r"
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Translingual
Etymology
In Stetigkeit und irrationale Zahlen (1872) Richard Dedekind uses R to denote rational numbers and ℜ to denote real numbers. The usage of blackboard bold dates to the 1960s.
Noun
ℝ
- (mathematics) The set of real numbers.
- (mathematics) This set, equipped with any of its standard structure; the real line.
Derived terms
- ℝ-order tree (English)