1.1 --- a/doc/groups.dox	Tue Sep 22 18:20:15 2015 +0200
     1.2 +++ b/doc/groups.dox	Wed Oct 07 18:49:46 2015 +0200
     1.3 @@ -585,7 +585,7 @@
     1.4  In addition, the graph nodes may be \e labeled, i.e. we are given two
     1.5  node labelings \f$l_1:V_1\longrightarrow L\f$ and \f$l_2:V_2\longrightarrow
     1.6  L\f$ and we require that \f$l_1(u)=l_2(f(u))\f$ holds for all nodes \f$u \in
     1.7 -G\f$.
     1.8 +G_1\f$.
     1.9  
    1.10  */
    1.11