# ⊥ U+22A5 UP TACK

Upside-down T, meaning perpendicular, bottom, false, or contradiction in logic and type theory.

| | |
|---|---|
| Character | `⊥` |
| Codepoint | U+22A5 |
| Name | UP TACK |
| Also known as | base, bottom |
| Block | [Mathematical Operators](https://unicodekit.com/block/mathematical-operators) |
| Script | Common |
| Category | Math Symbol (Sm) |
| Unicode version | 1.1 |
| HTML | `⊥` `⊥` |
| CSS | `\22A5` |
| JavaScript | `\u22A5` |
| UTF-8 | E2 8A A5 |
| UTF-16 | 22A5 |

## Related characters

- ⊤ [U+22A4 DOWN TACK](https://unicodekit.com/char/22A4)
- ⊦ [U+22A6 ASSERTION](https://unicodekit.com/char/22A6)
- ⊣ [U+22A3 LEFT TACK](https://unicodekit.com/char/22A3)
- ⊧ [U+22A7 MODELS](https://unicodekit.com/char/22A7)
- ⊢ [U+22A2 RIGHT TACK](https://unicodekit.com/char/22A2)
- ⊨ [U+22A8 TRUE](https://unicodekit.com/char/22A8)
- ⊡ [U+22A1 SQUARED DOT OPERATOR](https://unicodekit.com/char/22A1)
- ⊩ [U+22A9 FORCES](https://unicodekit.com/char/22A9)
- ⊠ [U+22A0 SQUARED TIMES](https://unicodekit.com/char/22A0)
- ⊪ [U+22AA TRIPLE VERTICAL BAR RIGHT TURNSTILE](https://unicodekit.com/char/22AA)
- ⊟ [U+229F SQUARED MINUS](https://unicodekit.com/char/229F)
- ⊫ [U+22AB DOUBLE VERTICAL BAR DOUBLE RIGHT TURNSTILE](https://unicodekit.com/char/22AB)

Page: https://unicodekit.com/char/22A5 · JSON: https://unicodekit.com/characters/22A5