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

• 𝐐

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