Provided by: nauty_2.6r10+ds-1ubuntu1_amd64 

NAME
nauty-delptg - delete vertices
SYNOPSIS
delptg [-lq] [-d#|d#:#] [-n#] [infile [outfile]]
DESCRIPTION
Delete some vertices from a file of graphs.
The output file has a header if and only if the input file does. No isomorph reduction is done.
-l Canonically label outputs
-d# -d#:# Only remove vertices with original degree in the given range
For digraphs, the out-degree is used.
-n# The number of vertices to delete (default 1).
Inputs that are too small are ignored; no empty graphs are output.
-q Suppress auxiliary information
nauty 2.6.10 February 2020 NAUTY-DELPTG(1)