Fact Crat_span_zmod_closed s : zmod_closed (Crat_span s).Canonical Crat_span_opprPred s := OpprPred (Crat_span_zmod_closed s).Canonical Crat_span_addrPred s := AddrPred (Crat_span_zmod_closed s).Canonical Crat_span_zmodPred s := ZmodPred (Crat_span_zmod_closed s).Implicit Type rR : unitRingType.

Lemma fmorph_numZ (Qz1 Qz2 : fieldExtType rat) (f : {rmorphism Qz1 -> Qz2}) : scalable f.