Provided by: nauty_2.8.8+ds-5_amd64 
      
    
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.
nauty 2.8.8                                        April 2024                               NAUTY-UNDERLYINGG(1)