fact: Definition Z2z z := match z mod exx.(vN) with | Zpos p => snd (ZnZ.of_pos p) | _ => ZnZ.zero end.
imports: ZArith Znumtheory Zpow_facts CyclicAxioms Cyclic63 Int63Compat Bignums(DoubleCyclic BigN) W Mod_op ZEll Bits Zmod