∅ ⦰ ⦱ ⦲ ⦳ ⦴
| Empty Set Symbol | Symbol Name | Dec Code | Hex Code | Unicode |
|---|---|---|---|---|
| ∅ | Empty Set | ∅ | ∅ | U+2205 |
| ⦰ | Reversed Empty Set | ⦰ | ⦰ | U+29B0 |
| ⦱ | Empty Set with Overbar | ⦱ | ⦱ | U+29B1 |
| ⦲ | Empty Set with Small Circle Above | ⦲ | ⦲ | U+29B2 |
| ⦳ | Empty Set with Right Arrow Above | ⦳ | ⦳ | U+29B3 |
| ⦴ | Empty Set with Left Arrow Above | ⦴ | ⦴ | U+29B4 |