Section ZpUnitMorphism.
Variable u : {unit 'Z_#[a]}.
Definition Zp_unitm := aut injm_cyclem im_cyclem.
End ZpUnitMorphism.
Canonical Zp_unit_morphism := Morphism Zp_unitmM.

Lemma Aut_cycle_abelian : abelian (Aut <[a]>).