The LaTeX command for forall (∀) is \forall (for all / universal quantifier).
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| Command | Package | Use it when |
|---|---|---|
\forall recommended | none | Universal quantifier. |
\exists | none | Existential quantifier. |
\exists! | none | There exists a unique. |
\nexists | amssymb | There does not exist. |
Write \forall inside math mode, that is between $…$ for inline math or in a \[ … \] or equation block for display math. It is part of core LaTeX math, so no extra package is required.
$\forall \varepsilon > 0, \exists \delta > 0$Open this example in the live preview: it renders as you type, with no compiler and no signup.
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Use \forall in math mode; it needs no extra package. For example, $\forall \varepsilon > 0, \exists \delta > 0$.
None: \forall is built into LaTeX, so no extra package is required.