`sm1.ecartd_reduction`

`sm1.ecartd_reduction(``F`,`A`)-
:
It returns a reduced form of
`F`in terms of`A`by using a tangent cone algorithm. h[0,1](D)-homogenization is used.

Example:

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

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