Provided by: nauty_2.8.6+ds-2_amd64 bug

NAME
       nauty-underlyingg - take the underlying undirected graphs of a file of graphs


SYNOPSIS
       underlyingg [-q] [infile [outfile]]


DESCRIPTION
              Take the underlying undirected graphs of a file of graphs.

              The  output  file  has  no  header.   Undirected  graphs are passed through without
              change, while Underlying graphs of digraphs are written in sparse6 format.

       -q     Suppress auxiliary information.