ideal(MultiprojectiveVariety) -- the defining ideal of the variety

i1 : X = projectiveVariety ideal random({2,1},ZZ/101[x_0,x_1,x_2,y_0,y_1,Degrees=>{3:{1,0},2:{0,1}}]);

o1 : ProjectiveVariety, surface in PP^2 x PP^1

i2 : ideal X

            2                  2                            2        2                 2                           2
o2 = ideal(x y  + 24x x y  + 8x y  + 5x x y  - 34x x y  + 3x y  + 49x y  + 3x x y  + 3x y  + 5x x y  - 43x x y  - x y )
            0 0      0 1 0     1 0     0 2 0      1 2 0     2 0      0 1     0 1 1     1 1     0 2 1      1 2 1    2 1

               ZZ
o2 : Ideal of ---[x ..x , y ..y ]
              101  0   2   0   1