---
title: "Key projection mathematical notation"
description: "Key projection is a recurring research-paper notation family. Projects token representations into key vectors against which queries are compared to form…"
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md_url: "https://fanout.sh/labs/math-decoder/symbol/key-projection.md"
last_updated: "2026-08-09"
access: "public"
---

# Key projection mathematical notation

Key projection is a recurring research-paper notation family. Projects token representations into key vectors against which queries are compared to form…

## Public overview

Key projection is a recurring research-paper notation family. Projects token representations into key vectors against which queries are compared to form attention scores.

Key projection: Projects token representations into key vectors against which queries are compared to form attention scores. Example: Transform every token representation into key vectors used for matching.

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