Sigma in LaTeX

The LaTeX command for sigma (σ) is \sigma.

\sigma

Greek Lowercase · Unicode σ (U+03C3) · no package needed

How to type Sigma

Write \sigma inside math mode — that is, between $…$ for inline math or in a \[ … \] / equation block for display math. It is part of core LaTeX math, so no extra package is required.

Example

$\sigma \in \mathbb{R}$

\sigma \in \mathbb{R}

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Related Greek Lowercase symbols

\alpha\beta\gamma\delta\epsilon\varepsilon\zeta\eta\theta\vartheta\iota\kappa\varkappa\lambda

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FAQ

How do you write sigma (σ) in LaTeX?

Use \sigma in math mode — it needs no extra package. For example, $\sigma \in \mathbb{R}$.

Which package provides \sigma?

None — \sigma is built into LaTeX's math mode, so no extra package is required.

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