function L = graph_arc_bush ( )

%*****************************************************************************80
%
%% graph_arc_bush() sets up the arc list for the bush graph.
%
%  Discussion:
%
%    The graph has 7 nodes and 6 edges or 12 arcs.
%    It is a tree.
%
%        6   3
%        |   |
%    1---4---5---2
%        |
%        7
%
%  Licensing:
%
%    This code is distributed under the MIT license. 
%
%  Modified:
%
%    30 April 2026
%
%  Author:
%
%    John Burkardt
%
%  Output:
%
%    integer L(arc_num,2): the arc list.  
%
  L = [ ...
    1, 4; ...
    2, 5; ...
    3, 5; ...
    4, 1; ...
    4, 5; ...
    4, 6; ...
    4, 7; ...
    5, 2; ...
    5, 3; ...
    5, 4; ...
    6, 4; ...
    7, 4 ];

  return
end
