nauty-converseg - Man Page
converseg [-q] [-a|-c] [infile [outfile]]
Take the converse digraphs of a file of directed graphs.
The output file has a header if and only if the input file does. Undirected graphs are passed through without change, while directed graphs are written in digraph6 format.
Also output the original graph (before the converse)
Output only self-converse digraphs
Suppress auxiliary information.
January 2023 nauty 2.8.6 Nauty Manual