---
title: "Sigma Function Icon | Free Download PNG & SVG | Iconoir Regular"
product: "Streamline Icons, Illustrations and Elements"
url: /icons/download/sigma-function--29591
canonical_url: "https://www.streamlinehq.com/icons/download/sigma-function--29591"
summary: "Clean line icon of an angular sigma symbol with open right terminals. Used for formulas, summation, and calculus tools."
---

# Sigma Function icon

The Sigma Function icon shows an angular sigma symbol with horizontal top and bottom bars, diagonal sides, and short open right terminals. Drawn in the line style on a 16px grid with a 1px stroke so it stays crisp at small sizes. Use it for mathematical notation, formula editors, summation controls, and calculus interfaces. It belongs to Iconoir Regular free set in the Iconoir family.

## Preview

![Clean line icon of an angular sigma symbol with open right terminals. Used for formulas, summation, and calculus tools.](https://assets.streamlinehq.com/image/private/w_300,h_300,ar_1/f_auto/v1/icons/4/sigma-function-ywbmzj1p7ugyfgvciagyo.png/sigma-function-gvoxrdojer7qwb6usz1uo.png?_a=DATAiZkSZAA0)

## Details

- **Name**: Sigma Function
- **Type**: Icon
- **Set**: [Iconoir Regular](/icons/iconoir-regular.md) — Iconoir is a free and open source icon set created by Luca Burgio with clean, consistent design.
- **Family**: [Iconoir](/icons/iconoir.md)
- **Style**: Line, Stroke
- **Category**: All Icons › All Icons
- **Default size**: 16px
- **Stroke width**: 1px
- **Pricing**: Free
- **License**: [MIT](https://github.com/iconoir-icons/iconoir/blob/main/LICENSE)
- **Author**: [Iconoir](https://iconoir.com/)
- **Formats**: PNG, WEBP, PDF, SVG, JSX
- **Tags**: sigma, sum, math, notation, function, addition, algebra, calculus, greek, geometry

## Download

- [Download Sigma Function on Streamline](https://www.streamlinehq.com/icons/download/sigma-function--29591)

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