∩
Intersection
- Unicode
- U+2229
- Category
- Math
- HTML Entity
- ∩
- CSS
- \2229
The ∩ symbol, commonly known as "Intersection" or "cap" in mathematics, represents the set of elements shared by two or more sets. Originating from set theory notation, its inverted-U shape is universally recognized in logic and probability to denote the logical AND operation. While strictly a mathematical symbol, you will often spot it in academic discussions, technical documentation, or online tutorials explaining Venn diagrams and data overlap.
How to Type
- Windows
- Alt+8745 or type 2229 then Alt+X (in Word)
- macOS
- Control+Command+Space then search "intersection"
- Linux
- Ctrl+Shift+U then 2229
- HTML
- ∩ or ∩
In Programming
In LaTeX and mathematical formatting engines, the symbol is generated using the \cap command. While standard programming languages typically use the & operator or built-in functions (like set.intersection() in Python) to compute shared elements, the ∩ character is frequently used in comments and documentation to express the logic mathematically.
Tags
and operator
cap symbol
common elements
inverted u
logical and
math cap
mathematics
overlap
overlap symbol
set intersection
set theory
upside down u
venn diagram
∩ symbol