Man page - nauty-addptg(1)

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NAUTY-ADDPTG(1) Nauty Manual NAUTY-ADDPTG(1)

nauty-addptg - add additional vertices in various ways

addptg [-lq] [-n#] [-j#:#] [-e#:#] [-ck] [-io] [infile [outfile]]

Add a specified number of new vertices
The output file has a header if and only if the input file does.
canonically label outputs
join each new vertex to all the old vertices
make a clique on the set of new vertices

-n# the number of new vertices (default 1)

-j# -j#:# join a new vertex to # old vertices in all possible ways

-e# -e#:# use all joins that give the new graphs # edges

(-j, -e are each incompatible with -n)
for a digraph, edges go towards the old vertices
for a digraph, edges go away from the old vertices
(-i is the default if neither -i nor -o is given)
Suppress auxiliary information
February 2025 nauty 2.8.9