What it means
An upside-down A, the universal quantifier: what follows holds for every value in the stated range.
Read aloud in real formulas
∀x ∈ ℝ, x² ≥ 0
Aethel says
for all x in the real numbers, x squared is greater than or equal to 0
every real number has a non-negative square
Typing it
- LaTeX
- \forall
- Unicode
- U+2200
Questions
How do you say ∀ out loud?
It is usually read “for all”, and also “for every”.
What does ∀ mean in maths?
An upside-down A, the universal quantifier: what follows holds for every value in the stated range.
How do you type ∀?
In LaTeX, write \forall. Its Unicode code point is U+2200.