∅ empty set
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Character info
| Character | ∅ |
|---|---|
| Unicode | U+2205 |
| Korean name | 공집합 |
| Official name | empty set |
| Category | Math symbol |
| HTML code | ∅ |
| JavaScript | "\u{2205}" |
Names and categories come from official Unicode 18.0.0 data. Korean names are ours. Unicode UnicodeData.txt 18.0.0 (Unicode License v3)
Type it yourself
- In Microsoft Word, type 2205 and press Alt+X right after it. The code turns into the character.
Look-alikes
∅ (empty set), Ø ø (Nordic letter o with stroke) and ⌀ (diameter sign) look similar but are different characters.
U+2205 empty set, U+00D8 latin capital letter o with stroke, U+00F8 latin small letter o with stroke, U+2300 diameter sign