proposition: Lemma ra_ca_proj_inv k (p : pos k) v n x : [ra_proj p;v] -[n>> x -> n = 1 /\ x = vec_pos v p.
proof: Proof. myauto; ra_inj; auto. Qed.
imports: Arith Eqdep_dec Undecidability.Shared(DLW.Utils.utils DLW.Vec.vec DLW.Vec.pos) Undecidability.MuRec.Util(recalg)