---
title: "Set intersection mathematical notation"
description: "Set intersection is a recurring research-paper notation family. Builds a set containing only elements that occur in every input set."
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/intersection"
md_url: "https://fanout.sh/labs/math-decoder/symbol/intersection.md"
last_updated: "2026-08-09"
access: "public"
---

# Set intersection mathematical notation

Set intersection is a recurring research-paper notation family. Builds a set containing only elements that occur in every input set.

## Public overview

Set intersection: Builds a set containing only elements that occur in every input set. Example: Keep only elements shared by A and B.

---
This representation contains public Fanout content only. Protected Pro lessons, account data, billing, checkout, and pricing are not included.

Browse the public content map: https://fanout.sh/sitemap.md