Description
Given a list of polynomials F = (F_0,...,F_n) and a differential form w on n+1 variables, the pullback F*w is defined as the composition w(F).
In this example we compute the pullback of the 1differential form w with respect to the mapping F = (F_0,F_1,F_2).
i1 : F_0 = random newForm(1,0,1,"a");

i2 : F_1 = random newForm(1,0,2,"a");

i3 : F_2 = random newForm(1,0,1,"a");

i4 : w = random newForm(2,2,1,"a")
o4 = ( 5x  3x + 6x )dx dx + ( 3x + 4x + 7x )dx dx + ( 3x + 2x 
0 1 2 0 1 0 1 2 0 2 0 1

3x )dx dx
2 1 2
o4 : DiffAlgForm

i5 : {F_0,F_1,F_2}*w
3 2 2 3 2 2
o5 = (17x + 75x x  885x x  800x + 593x + 3162x x  3680x + 288x 
0 0 1 0 1 1 0 0 1 1 0

256x )dx dx
1 0 1
o5 : DiffAlgForm
