hyperplanes A
toList A
This returns the list of linear forms defining an arrangement. These forms will be elements of the coordinate ring of $A$.
i1 : A = typeA 3 o1 = {x - x , x - x , x - x , x - x , x - x , x - x } 1 2 1 3 1 4 2 3 2 4 3 4 o1 : Hyperplane Arrangement
i2 : hyperplanes A o2 = {x - x , x - x , x - x , x - x , x - x , x - x } 1 2 1 3 1 4 2 3 2 4 3 4 o2 : List