`sm1.gb_reduction`

`sm1.gb_reduction(``F`,`A`)-
:
It returns a reduced form of
`F`in terms of`A`by using a normal form algorithm. h[1,1](D)-homogenization is used.

Example:

input F=[2*(h-x-y)*dx+h^2,2*(h-x-y)*dy+h^2]$ FF=[F,"x,y",[[dx,1,dy,1],[x,-1,y,-1,dx,1,dy,1]]]$ sm1.gb_reduction((h-x-y)^2*dx*dy,FF);

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