∅
    | Symbol | Format | Data | 
|---|---|---|
| ∅ | Code Point | U+2205 | 
| TeX | \empty | |
| SVG | 
Empty set symbol.
The 0 (zero) symbol is used in math to represent the number zero or nothing.
An empty set, also called the null set, is respresented as a zero with a diagonal line through it or as an empty pair of curly braces.