NAME

       nauty-delptg - delete vertices

SYNOPSIS

       delptg [-lq] [-a|-b] [-d#|-d#:#] [-v#|-v#:#] [-r#] [-n#] [-m#|-i] [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).

       -v# -v#:# Vertex number or numbers that it is allowed to delete

              (first vertex is number 0).

       -m# Lower bound on minimum degree of output graphs.

       -r# Choose # random sets of points (not necessarily different)

       -a     The deleted points must be adjacent.

       -b     The deleted points must be non-adjacent.

       -i     Leave deleted vertices as isolates, not compatible with -m.

              No empty graphs are output. No warning is issued if

              -d, -v -n, -m together imply no graphs are output.

              For digraphs, out-degree is used for -d and -m.  -q  Suppress auxiliary information