quiverIncidenceMatrix -- return the graph incidence matrix attribute associated to the toric quiver

• Usage:

  quiverIncidenceMatrix Q

• Inputs:
  • Q, a toric quiver,
• Outputs:
  • M, a matrix, that is the incidence matrix for the graph of the toric quiver

i1 : Q = bipartiteQuiver(2, 3);

i2 : quiverIncidenceMatrix Q

o2 = | -1 -1 -1 0  0  0  |
     | 0  0  0  -1 -1 -1 |
     | 1  0  0  1  0  0  |
     | 0  1  0  0  1  0  |
     | 0  0  1  0  0  1  |

              5       6
o2 : Matrix ZZ  <-- ZZ