-- -*- M2-comint -*- hash: 9713154430926119223

i1 : A = arrangement "X3"

o1 = {x , x , x , x  + x , x  + x , x  + x }
       1   2   3   1    2   1    3   2    3

o1 : Hyperplane Arrangement 

i2 : dA = deCone(A,2)

o2 = {x , x , x  + x , x  + 1, x  + 1}
       1   2   1    2   1       2

o2 : Hyperplane Arrangement 

i3 : factor poincare A

                        2
o3 = (1 + T)(1 + 5T + 7T )

o3 : Expression of class Product

i4 : poincare dA

                2
o4 = 1 + 5T + 7T

o4 : ZZ[T]

i5 : ring dA

     QQ[x ..x ]
         1   3
o5 = ----------
       x  - 1
        3

o5 : QuotientRing

i6 : dA' = prune dA

o6 = {x , x , x  + x , x  + 1, x  + 1}
       1   2   1    2   1       2

o6 : Hyperplane Arrangement 

i7 : ring dA'

o7 = QQ[x ..x ]
         1   2

o7 : PolynomialRing

i8 : 
