Corrected bugs reported by Koubek.

[saga.git] / notation.tex

diff --git a/notation.tex b/notation.tex
index f8a512f4084c1fe92c33079deb8d72b33f1a10f5..e02cccf67e49f23f78e77d15a54e569d54adbcb5 100644 (file)
--- a/notation.tex
+++ b/notation.tex
@@ -113,7 +113,7 @@ 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 $E\rightarrow V \cup {V \choose 2}$
+with the vertices, and $M$ is a mapping $E\rightarrow {V \choose 2} \cup {V \choose 1}$
 which assigns to each edge either a pair of vertices or a single vertex
 (if the edge is a loop).