# lmlib.polynomial.poly.poly_prod_coef#

lmlib.polynomial.poly.poly_prod_coef(polys)#

$$\alpha^\mathsf{T} x^q \cdot \beta^\mathsf{T} x^r = \color{blue}{\tilde{\alpha}}^\mathsf{T} x^\tilde{q}$$

Coefficient vector $$\tilde{\alpha}$$ of product of two univariate polynomials of common variable x

Parameters

polys (tuple of Poly) – (poly_1, poly_2), two polynomials to be multiplied

Returns

alpha_tilde, coefficient vector $$\tilde{\alpha}$$ of product polynomial $$\tilde{\alpha}^\mathsf{T} x^\tilde{q}$$, see poly_prod()

Return type

References

[Wildhaber2019] (Eq. 6.12)