Infinity symbol

"∞" redirects here. For other uses, see infinity (disambiguation) and infinity sign (disambiguation).
Infinity symbol
In UnicodeU+221E ∞ INFINITY (∞)
Different from
Different fromU+267E ♾ PERMANENT PAPER SIGN
U+26AD ⚭ MARRIAGE SYMBOL
U+221D ∝ PROPORTIONAL TO

The infinity symbol (∞) is a mathematical symbol representing the concept of infinity. This symbol is also called a lemniscate,[1] after the lemniscate curves of a similar shape studied in algebraic geometry,[2] or "lazy eight", in the terminology of livestock branding.[3]

This symbol was first used mathematically by John Wallis in the 17th century, although it has a longer history of other uses. In mathematics, it often refers to infinite processes (potential infinity) rather than infinite values (actual infinity). It has other related technical meanings, such as the use of long-lasting paper in bookbinding, and has been used for its symbolic value of the infinite in modern mysticism and literature. It is a common element of graphic design, for instance in corporate logos as well as in older designs such as the Métis flag.

Both the infinity symbol itself and several variations of the symbol are available in various character encodings.

  1. ^ Cite error: The named reference mind was invoked but never defined (see the help page).
  2. ^ Cite error: The named reference beautiful was invoked but never defined (see the help page).
  3. ^ Cite error: The named reference zero was invoked but never defined (see the help page).