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NAUTY-DELPTG(1) Nauty Manual NAUTY-DELPTG(1)

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.
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)

The deleted points must be adjacent.
The deleted points must be non-adjacent.
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
November 2022 nauty 2.8.6