Fact mx_repr_is_action : is_action G mx_repr_act.Canonical Structure mx_repr_action := Action mx_repr_is_action.Canonical Structure mx_repr_groupAction := GroupAction mx_repr_is_groupAction.Local Notation "'Zm" := (scale_action _ _) (at level 8) : action_scope.Notation "''MR' rG" := (mx_repr_groupAction rG) : groupAction_scope.Fact scale_is_action : is_action setT scale_act.Canonical scale_action := Action scale_is_action.Fact scale_is_groupAction : is_groupAction setT scale_action.Canonical scale_groupAction := GroupAction scale_is_groupAction.Fact rowg_group_set m A : group_set (@rowg m A).Canonical rowg_group m A := Group (@rowg_group_set m A).

Lemma rowg_mx1 : rowg_mx 1%g = 0.