From 4bcf3aa4d41a3860fbef12165a2abac317853a85 Mon Sep 17 00:00:00 2001
From: Andrew Lorimer <andrew@lorimer.id.au>
Date: Tue, 19 Feb 2019 17:16:06 +1100
Subject: [PATCH] fog/gof

---
 methods/transformations.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/methods/transformations.md b/methods/transformations.md
index 121c02c..c9e5cd1 100644
--- a/methods/transformations.md
+++ b/methods/transformations.md
@@ -112,4 +112,8 @@ Product functions:
 
 Find new point $(x^\prime, y^\prime)$. Substitute these into original equation to find image with original variables $(x, y)$.
 
+## Composite functions
+
+$(f \circ g)(x)$ is defined iff $\operatorname{ran}(g) \subseteq \operatorname{dom}(f)$
+
 
-- 
2.43.2