Surjection Arrow
↠
Type it
| Unicode | U+21A0 | |
|---|---|---|
| LaTeX | \twoheadrightarrow | |
| HTML entity | ↠ | |
| Character | ↠ |
Meaning
Shows a surjective map, where every element of the codomain is hit by at least one input. In LaTeX it needs the amssymb package. Compare with Injection Arrow and Right Arrow.
How to read it
f: A ↠ B
is read “f is a surjection from A onto B”.