fact: Definition poly_summation α {R : ring α} {K : field R} (li : list nat) g := (POL (lap_summation li (λ i, al (g i))))%pol.
imports: Utf8 QArith NPeano Sorted ConvexHullMisc ConvexHull PolyConvexHull Field2 Misc Newton NbarM QbarM SplitList Fsummation Fpolynomial Power_series Puiseux_series Ps_add Ps_mul Ps_div Ps_add_compat PSpolynomial Puiseux_base CharactPolyn AlgCloCharPol