Correcting call to extension - adding number of variables.
Corrected reduced decomp to compute reduced decomposition in elementary algebra not in polynomial ring
Corrected reference of elementary as e
One belongs to the parent of a polynomial not to the polynomial.
Call the support of the decomposition.
Corrected indexing error in elementary expansion
Gens is a function of the parent of the polynomial.
Added coercion so the decomposition isn't returned in the ring with an extra variable.
Correcting the base values for combination decompositions. n and 1 were swapped.
Added missing return statement