∞

Alternative forms
Early forms (e.g. in Euler's texts) may approach a 'lazy S', ∾. It has also been attributed to and conjectured to originate from, since 1,000 was hyperbolically used to represent very large numbers.

Symbol

 * 1) A symbol representing infinity.
 * $$\lim_{x \to 0^+} \frac{1}{x} = +\infty$$
 * $$\lim_{x \to 0^+} \frac{1}{x} = +\infty$$

Usage notes
This symbol is called the "infinity symbol". It is also called a lemniscate and a "lazy eight".