i1 : f = random(ZZ^6, ZZ^4) o1 = | 1 8 7 9 | | 8 7 9 9 | | 1 9 6 9 | | 4 2 2 4 | | 3 1 1 7 | | 7 9 6 5 | 6 4 o1 : Matrix ZZ <--- ZZ |
i2 : M = subquotient ( f * diagonalMatrix{2,3,8,21}, f * diagonalMatrix{2*11,3*5*13,0,21*5} ) o2 = subquotient (| 2 24 56 189 |, | 22 1560 0 945 |) | 16 21 72 189 | | 176 1365 0 945 | | 2 27 48 189 | | 22 1755 0 945 | | 8 6 16 84 | | 88 390 0 420 | | 6 3 8 147 | | 66 195 0 735 | | 14 27 48 105 | | 154 1755 0 525 | 6 o2 : ZZ-module, subquotient of ZZ |
i3 : factor M ZZ ZZ ZZ o3 = ZZ + -- + -- + ---- 5 11 5*13 o3 : Expression of class Sum |