Infinity Symbol
The infinity symbol is a mathematical symbol that represents an infinitely large number.
The infinity symbol is written with the Lemniscate symbol:
∞
It represents an infinitely positive big number.
When we want to write an infinitely negative number we should write:
-∞
When we want to write an infinitely small number we should write:
1/∞
Is infinity a number?
Infinity is not a number. It does not represent a specific number, but an infinitely large quantity.
Infinity rules & properties
Name Key type Positive infinity ∞ Negative infinity -∞ Infinity difference ∞ - ∞ is undefined Zero product 0 · ∞ is undefined Infinity quotient ∞ / ∞ is undefined Real number sum x + ∞ = ∞, for x∈ℝ Positive number product x · ∞ = ∞, for x>0 How to type infinity symbol on keyboard
Platform Key type Description PC windows ALT+236 Hold the ALT key and type 236 on the num-lock keypad. Macintosh Option+5 Hold the Option key and press 5 Microsoft word Insert > Symbol > ∞ Menu selection: Insert > Symbol > ∞ ALT+236 Hold the ALT key and type 236 on the num-lock keypad. Microsoft excel Insert > Symbol > ∞ Menu selection: Insert > Symbol > ∞ ALT+236 Hold the ALT key and type 236 on the num-lock keypad. Web page CTRL+C, CTRL+V Copy ∞ from here and paste it in your web page. CTRL+C, CTRL+V Copy ∞ from here and paste it in your Facebook page. HTML ∞ or ∞ ASCII code 236 Unicode U+221E LaTeX \infty MATLAB \infty Example: title('Graph to \infty')
See also
Online Reference & Tools