\[DoubleLeftRightArrow]

  • Unicode: 21D4.
  • Alias: <=>.
  • Infix arrow operator.
  • x y is by default interpreted as DoubleLeftRightArrow[x,y].
  • Used in mathematics to indicate logical equivalence.
  • Extensible character.
  • Not the same as \[Equivalent].

See Also

\[DoubleLongLeftRightArrow]  \[LeftRightArrow]  \[RightArrowLeftArrow]  \[LeftArrowRightArrow]  \[Congruent]  \[Implies]

Tutorials

Introduced in 1996
(3.0)