nauty-ancestorg - removes a specified number of final vertices

              The g-th generation ancestor of a graph is the graph obtained by removing

              the  final  g  vertices.  The 0-th generation ancestor is the graph itself.  For each input graph,
              write the ancestors whose generation is given  by  the  g  argument.   No  zero-sized  graphs  are
              written.  Output is always in graph6 format.

              The output file has a header if and only if the input file does.

       -g# -g#:#
              Specify a generation or range of generations (default: all)

       -q     Suppress auxiliary information

nauty 2.8.9                                      September 2024                               NAUTY-ANCESTORG(1)

       nauty-ancestorg - removes a specified number of final vertices

ancestorg [-q] [-g#:#|-g#] [infile [outfile]]