End Frattini.
Canonical Frattini_igFun := [igFun by Phi_sub & Frattini_continuous].
Canonical Frattini_gFun := [gFun by Frattini_continuous].
Section Frattini0.
Variable gT : finGroupType.
Implicit Types (rT : finGroupType) (D G : {group gT}).

Lemma Phi_char G : 'Phi(G) \char G.
End Frattini0.