proposition: Lemma swapXY_map_polyC p : swapXY p^:P = p%:P.
proof: Proof. by rewrite -swapXY_polyC swapXYK. Qed.
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype choice ssrnat seq) mathcomp(fintype tuple finfun bigop fingroup perm div) mathcomp(ssralg zmodp matrix mxalgebra) mathcomp(poly polydiv mxpoly binomial)