Fixed a typo.

diff --git a/notation.tex b/notation.tex
index 341f135c07b314580e0793a8f6ca1fdd964ca474..1f74341d0ae532c45f561cdccd75e730b2e171a3 100644 (file)
--- a/notation.tex
+++ b/notation.tex
@@ -81,7 +81,7 @@ better define it carefully, following \cite{diestel:gt}:
 
 \defn A~\df{multigraph} is an ordered triple $(V,E,M)$, where $V$~is the
 set of vertices, $E$~is the set of edges, taken as abstract objects disjoint
-with the vertices, and $M$ is a mapping $E\mapsto V \cup {V \choose 2}$
+with the vertices, and $M$ is a mapping $E\rightarrow V \cup {V \choose 2}$
 which assigns to each edge either a pair of vertices or a single vertex
 (if the edge is a loop).