Local Notation "''I[' phi ]" := (inertia phi) : group_scope.Canonical inertia_group H phi := Group (@group_set_inertia H phi).Local Notation "''I[' phi ]" := (inertia_group phi) : Group_scope.

Proof. by move=> i; apply/irr_inj; rewrite !conjg_IirrE cfConjgK. Qed