fact: Definition target_comRingMorph (R : target_comRing) : R -> R := match R with | target_int => intr | target_Z => fun n => (int_of_Z n)%:~R | target_other_comRing _ => id end.
imports: elpi(elpi) Coq(ZArith Ring Ring_polynom Field_theory) mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat choice seq) mathcomp(fintype finfun bigop order ssralg ssrnum ssrint) mathcomp.zify(ssrZ zify) mathcomp.algebra_tactics(common)