Windows
2 options- In Word / Outlook: type 22A5 then press Alt + X.
- Anywhere: press Win + . to open the emoji & symbol picker, then search.
Up Tack Symbol
A symbol from the Math Symbols collection. Click the symbol or the button below to copy.
- Symbol
- ⊥
- Unicode
- U+22A5
- HTML entity
- ⊥
- Category
- Math Symbols
Export
Download Up Tack as SVG or PNG — or add a caption to make a labelled icon, badge or sticker.
Background
Previewtransparent background
Fill color applies to monochrome symbols; multicolor emoji keep their own colors. Add a circle/rounded background to make an app icon or avatar. Exports are self-contained; the SVG embeds the glyph's font. Without a background, exports are transparent.
29 of 96 in the math symbols collection
About the up tack symbol
The symbol is read as "up tack" or sometimes "bottom" in mathematical and logical contexts. In formal logic and lattice theory, it represents the falsum, or the absolute false proposition, serving as the counterpart to the truth symbol (often a down tack). It also appears in type theory and computer science to denote the bottom type—a type with no values—or the undefined or diverging computation. Beyond these fields, the up tack is used in various notations for perpendicularity, orthogonality, or as a generic placeholder for a minimal element in ordered structures.
How to type Up Tack
Native keyboard shortcuts for each operating system — derived from the codepoint, so the steps below are always accurate.
macOS
2 options- Enable “Unicode Hex Input” in System Settings → Keyboard, then hold Option and type 22A5.
- Or: Control + Command + Space opens the Character Viewer — search by name.
Linux
1 step- Press Ctrl + Shift + U, type 22A5, then press Enter or Space.
Copy in every format
Every form of this character — for HTML, CSS, JavaScript, URLs and more. Click any value to copy.
Related math symbols
Other math symbols you can copy and paste — explore similar Unicode characters from the same family.
- +Plus SignCopy the plus sign symbol→
- −Minus SignCopy the minus sign symbol→
- ×Multiplication SignCopy the multiplication sign symbol→
- ÷Division SignCopy the division sign symbol→
- ±Plus-Minus SignCopy the plus-minus sign symbol→
- ∓Minus-Or-Plus SignCopy the minus-or-plus sign symbol→
- =Equals SignCopy the equals sign symbol→
- ≠Not Equal ToCopy the not equal to symbol→
- ≈Almost Equal ToCopy the almost equal to symbol→
- ≡Identical ToCopy the identical to symbol→
- ≤Less-Than Or Equal ToCopy the less-than or equal to symbol→
- ≥Greater-Than Or Equal ToCopy the greater-than or equal to symbol→
Explore related collections
Browse other symbol families that pair well with math symbols.