---
title: "Policy mathematical notation"
description: "Policy is a recurring research-paper notation family. Maps a state or history to a probability distribution over actions that an agent may select."
canonical_url: "https://fanout.sh/labs/math-decoder/symbol/policy"
md_url: "https://fanout.sh/labs/math-decoder/symbol/policy.md"
last_updated: "2026-08-09"
access: "public"
---

# Policy mathematical notation

Policy is a recurring research-paper notation family. Maps a state or history to a probability distribution over actions that an agent may select.

## Public overview

Policy: Maps a state or history to a probability distribution over actions that an agent may select. Example: The policy assigns a normalized choice probability to every action in state s.

---
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