-- -*- M2-comint -*- {* hash: -1292498611 *}

i1 : S = ZZ/10007[x,y];

i2 : betti coker matrix{{x^3,x*y^2},{y*x^2,y^3}}

            0 1
o2 = total: 2 2
         0: 2 .
         1: . .
         2: . 2

o2 : BettiTally

i3 : betti coker map(S^{0,-1},,matrix{{x^2,y},{y^3,x^2}})

            0 1
o3 = total: 2 2
         0: 1 .
         1: 1 .
         2: . 1
         3: . 1

o3 : BettiTally

i4 :