∞

See also: ᢁ [U+1881 MONGOLIAN LETTER ALI GALI VISARGA ONE] and ထ [U+1011 MYANMAR LETTER THA]

∞ U+221E, ∞ INFINITY ← ∝ [U+221D] Mathematical Operators ∟ → [U+221F]

Translingual

The infinity symbol in Euler's texts

The infinity symbol ∞ in several typefaces.

Alternative forms

Early forms (e.g. in Euler's texts) may approach a 'lazy S', ∾. It has also been attributed to John Wallis and conjectured to originate from its use as a Roman numeral, a way of writing ↀ, since 1,000 was hyperbolically used to represent very large numbers.

Symbol

∞ (English symbol name lemniscate or infinity symbol)

2. (mathematics) Infinity.

   ∞ + ∞ = ∞

   $\lim _{x\to 0^{+}}{\frac {1}{x}}=+\infty$

Usage notes

In English, this symbol is called the "infinity symbol". It is also called a lemniscate and a "lazy eight".

Derived terms

• ♾

See also

• ⧜
• ⧝
• ꝏ / Ꝏ