ℚ

See also: Appendix:Variations of "q"

ℚ U+211A, ℚ
DOUBLE-STRUCK CAPITAL Q
← ℙ
[U+2119] 		Letterlike Symbols ℛ →
[U+211B]

𝐐 U+1D410, 𝐐
MATHEMATICAL BOLD CAPITAL Q
← 𝐏
[U+1D40F] 		Mathematical Alphanumeric Symbols 𝐑 →
[U+1D411]

Translingual

Alternative forms

Etymology

From 𝐐, from the initial of Italian quoziente (“quotient”), a notation proposed in 1895 by mathematician Giuseppe Peano. The usage of blackboard bold dates to the 1960s.

Symbol

ℚ

  1. (mathematics) alternative form of 𝐐, the set of rational numbers
    Synonym: ℜ
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