There Exists Unique
∃!
Type it
| Unicode | U+2203 U+0021 | |
|---|---|---|
| LaTeX | \exists! | |
| HTML entity | ∃! | |
| Character | ∃! |
Meaning
The uniqueness quantifier. It states that exactly one object in the given range makes what follows true. Compare with There Exists and For All.
How to read it
∃!x ∈ ℝ, x + 3 = 0
is read “there exists a unique real number x such that x plus three equals zero”.