i1 : f = random(ZZ^6, ZZ^4) o1 = | 4 5 7 5 | | 2 1 4 0 | | 9 4 8 8 | | 1 3 7 1 | | 5 5 8 2 | | 4 7 1 0 | 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 (| 8 15 56 105 |, | 88 975 0 525 |) | 4 3 32 0 | | 44 195 0 0 | | 18 12 64 168 | | 198 780 0 840 | | 2 9 56 21 | | 22 585 0 105 | | 10 15 64 42 | | 110 975 0 210 | | 8 21 8 0 | | 88 1365 0 0 | 6 o2 : ZZ-module, subquotient of ZZ |
i3 : factor M ZZ ZZ ZZ o3 = ZZ + -- + -- + ---- 5 11 5*13 o3 : Expression of class Sum |