fact: Definition poly_shrinkable α (R : ring α) {K : field R} q f := ∀ n, n mod q ≠ O → List.nth n (al f) 0%K = 0%K.
imports: Utf8 QArith Sorted NPeano ConvexHull ConvexHullMisc Misc NbarM QbarM Newton PolyConvexHull Field2 Fpolynomial PSpolynomial Puiseux_base Power_series Puiseux_series Ps_div Slope_base