---
title: "Cross-entropy mathematical notation"
description: "Cross-entropy is a recurring research-paper notation family. Measures the average negative log probability that model distribution q assigns to outcomes…"
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/cross-entropy"
md_url: "https://fanout.sh/labs/math-decoder/symbol/cross-entropy.md"
last_updated: "2026-08-09"
access: "public"
---

# Cross-entropy mathematical notation

Cross-entropy is a recurring research-paper notation family. Measures the average negative log probability that model distribution q assigns to outcomes…

## Public overview

Cross-entropy is a recurring research-paper notation family. Measures the average negative log probability that model distribution q assigns to outcomes from p.

Cross-entropy: Measures the average negative log probability that model distribution q assigns to outcomes from p. Example: Penalize q when it gives low probability to outcomes weighted by p.

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