degreeMatrix -- computes the Hilbert-Burch degree matrix from a Betti table of ACM curves

• Usage:

  M = degreeMatrix B

• Inputs:
  • B, a Betti tally, of an ACM curve
• Outputs:
  • M, a matrix

i1 : B = generalACMBetti {-1,-1,2}

            0 1 2
o1 = total: 1 3 2
         0: 1 . .
         1: . 3 2

o1 : BettiTally

i2 : degreeMatrix B

o2 = | 1 1 |
     | 1 1 |
     | 1 1 |

              3       2
o2 : Matrix ZZ  <-- ZZ