---
title: "Attention output projection mathematical notation"
description: "Attention output projection is a recurring research-paper notation family. Maps concatenated or combined per-head attention features back into the…"
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/attention-output-projection"
md_url: "https://fanout.sh/labs/math-decoder/symbol/attention-output-projection.md"
last_updated: "2026-08-09"
access: "public"
---

# Attention output projection mathematical notation

Attention output projection is a recurring research-paper notation family. Maps concatenated or combined per-head attention features back into the…

## Public overview

Attention output projection is a recurring research-paper notation family. Maps concatenated or combined per-head attention features back into the model's hidden feature space.

Attention output projection: Maps concatenated or combined per-head attention features back into the model's hidden feature space. Example: Mix information from all attention heads into the residual-stream width.

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