---
title: "Reduce-scatter collective mathematical notation"
description: "Reduce-scatter collective is a recurring research-paper notation family. Reduces equal contributions across ranks and leaves each rank with a distinct…"
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/reduce-scatter"
md_url: "https://fanout.sh/labs/math-decoder/symbol/reduce-scatter.md"
last_updated: "2026-08-09"
access: "public"
---

# Reduce-scatter collective mathematical notation

Reduce-scatter collective is a recurring research-paper notation family. Reduces equal contributions across ranks and leaves each rank with a distinct…

## Public overview

Reduce-scatter collective is a recurring research-paper notation family. Reduces equal contributions across ranks and leaves each rank with a distinct equal-sized shard of the reduced result.

Reduce-scatter collective: Reduces equal contributions across ranks and leaves each rank with a distinct equal-sized shard of the reduced result. Example: Combine contributions and distribute different pieces rather than copying the whole result.

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