HELP FOR: the type heralg/quiverdata

SYNOPSIS:

• The type heralg/quiverdata is used to describe quivers for use with the functions of the heralg package.

• A quiver Q is denoted by a pair
  
  [ n, l ]
  
  where n is an integer - the number of vertices of Q - and l is a list
  
  l = [ l₁, ..., l_k ]
  
  giving the arrows of Q in the following way:
  Each entry l_i of l is a list
  
  l_i = [ s_i, t_i ]
  or
  l_i = [ s_i, t_i, r_i ]
  
  with two or three entries.
  Here, s_i and t_i give the starting and ending point of the arrow(s), while the optional third entry r_i is the multiplicity, i.e. the number of arrows from s_i to t_i (if not 1).

EXAMPLES:

> # a quiver of type tilde D_4:

> Q := [ 5, [ [1,3], [3,2], [3,4], [3,5] ] ];

> type(Q, `heralg/quiverdata`);

> # the generalized Kronecker quiver with r arrows:

> type( [ 2, [ [ 1, 2, r ] ] ], `heralg/quiverdata`);