See also: Appendix:Variations of "f"

U+2131, ℱ
SCRIPT CAPITAL F

[U+2130]
Letterlike Symbols
[U+2132]

Translingual

Symbol

  1. (mathematics) The set of functions. Usually used in the form ℱ(X,ℂ) to denote the set of functions whose domain is a relatively arbitrary set X and whose codomain is the set of complex numbers.
  2. (physics) The Fourier transform.