i1 : S = QQ[a..f]; |
i2 : m = matrix{{a,b,d,e},{b,c,e,f}} o2 = | a b d e | | b c e f | 2 4 o2 : Matrix S <--- S |
i3 : M = coker m o3 = cokernel | a b d e | | b c e f | 2 o3 : S-module, quotient of S |
i4 : sumBetti M o4 = 12 |
The object sumBetti is a method function.