fact: Definition spseq := map (fun x : R * R => x.1 / x.2 - a) (zip p (drop 1 p)).
imports: mathcomp(ssreflect ssrfun ssrbool eqtype ssrnat seq path choice fintype order) mathcomp(prime div bigop ssralg poly polydiv polyorder ssrnum zmodp) mathcomp(polyrcf qe_rcf_th complex)