fact: Definition ex_elim (x : nat) (pqs : seq tF * seq tF) := ex_elim_seq (map (abstrX x) pqs.1) (abstrX x (\big[GRing.Mul/1%T]_(q <- pqs.2) q)).
imports: HB(structures) mathcomp(ssreflect ssrfun ssrbool eqtype choice ssrnat seq) mathcomp(fintype generic_quotient bigop ssralg poly) mathcomp(polydiv matrix mxpoly countalg ring_quotient)