	to be inserted at the page 5.8 after the command SORT

	When sorting graphs by eigenvalues the sets of isomorphic graphs
will be reduced to a representative graph if we set the mode of sorting
to 1 by the following command

	SET MODE 2 [TO] <integer> .

before the SORT command. The default value of this mode is 0 in which
case the SORT command will not cause the deletion of isomorphic dupli-
cates.
