fact: Definition inB (z : C) := (Re z <= 0) && (Im z ^+2 <= 3%:R * Re z ^+2).
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)