Add Morphism rsub with signature (req ==> req ==> req) as rsub_ext3.Ltac norm := gen_srewrite Rsth Reqe ARth.Ltac add_push := gen_add_push radd Rsth Reqe ARth.

Lemma ARgen_phiPOS_Psucc : forall x, gen_phiPOS1 (Pos.succ x) == 1 + (gen_phiPOS1 x).