Amortized multi-point evaluation of multivariate polynomials

Joris van der Hoeven (1) , Grégoire Lecerf (1)

1 LIX - Laboratoire d'informatique de l'École polytechnique [Palaiseau]

The evaluation of a polynomial at several points is called the problem of multi-point evaluation. Sometimes, the set of evaluation points is fixed and several polynomials need to be evaluated at this set of points. Several efficient algorithms for this kind of "amortized" multi-point evaluation have been developed recently for the special cases of bivariate polynomials or when the set of evaluation points is generic. In this paper, we extend these results to the evaluation of polynomials in an arbitrary number of variables at an arbitrary set of points. We prove a softly linear complexity bound when the number of variables is fixed.

Domaines: Calcul formel [cs.SC]; Complexité [cs.CC]; Logiciel mathématique [cs.MS]

Joris van der Hoeven, Grégoire Lecerf. Amortized multi-point evaluation of multivariate polynomials. Journal of Complexity, 2022, ⟨10.1016/j.jco.2022.101693⟩. ⟨hal-03503021⟩