X-Git-Url: http://gitweb.michael.orlitzky.com/?a=blobdiff_plain;f=examples.tex;h=6edd5381ba8349d0ad7bb9aea9acfa763c7c345d;hb=a8d9b8e1e4f5c79b50cc57121dc974fc222e47a8;hp=98ddfd550b08ea4fd78301eb47c0aea19cb8de7a;hpb=5c4f67545f0988d065f1d52f90eed9233562c9fc;p=mjotex.git

diff --git a/examples.tex b/examples.tex
index 98ddfd5..6edd538 100644
--- a/examples.tex
+++ b/examples.tex
@@ -28,7 +28,8 @@
   \begin{section}{Arrow}
     The identity operator on $V$ is $\identity{V}$. The composition of
     $f$ and $g$ is $\compose{f}{g}$. The inverse of $f$ is
-    $\inverse{f}$.
+    $\inverse{f}$. If $f$ is a function and $A$ is a subset of its
+    domain, then the preimage under $f$ of $A$ is $\preimage{f}{A}$.
   \end{section}
 
   \begin{section}{Common}
@@ -260,5 +261,5 @@
     The interior of a set $X$ is $\interior{X}$. Its closure is
     $\closure{X}$ and its boundary is $\boundary{X}$.
   \end{section}
-  
+
 \end{document}