i1 : kk=ZZ/10007;R=kk[y_0..y_2]; |
i3 : m=coker transpose random(R^{1,2},R^2);E=annihilator m; o4 : Ideal of R |
i5 : RE=R/E; M= m**RE; N=M; |
i8 : time betti Hom0(M,M) -- used 0.0229353 seconds 0 1 o8 = total: 4 1 -1: . 1 0: 4 . o8 : BettiTally |
i9 : time betti Hom(M,N) -- used 0.00223782 seconds 0 o9 = total: 1 0: 1 o9 : BettiTally |