---
title: "Log-sum-exp mathematical notation"
description: "Log-sum-exp is a recurring research-paper notation family. Combines exponentials under a logarithm, appearing as a smooth maximum and as the…"
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/log-sum-exp"
md_url: "https://fanout.sh/labs/math-decoder/symbol/log-sum-exp.md"
last_updated: "2026-08-09"
access: "public"
---

# Log-sum-exp mathematical notation

Log-sum-exp is a recurring research-paper notation family. Combines exponentials under a logarithm, appearing as a smooth maximum and as the…

## Public overview

Log-sum-exp is a recurring research-paper notation family. Combines exponentials under a logarithm, appearing as a smooth maximum and as the normalization term for categorical logits.

Log-sum-exp: Combines exponentials under a logarithm, appearing as a smooth maximum and as the normalization term for categorical logits. Example: Shift logits before exponentiation to preserve the same value with better numerical range.

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