Arguments rfix_mxP {m W}.

(* Specifications: *)
Lemma rfix_mx_id (H : {set gT}) x : x \in H -> rfix_mx H *m rG x = rfix_mx H.
Lemma rfix_mx_conjsg (H : {set gT}) x :
x \in G -> H \subset G -> (rfix_mx (H :^ x) :=: rfix_mx H *m rG x)%MS.
Lemma norm_sub_rstabs_rfix_mx (H : {set gT}) :
H \subset G -> 'N_G(H) \subset rstabs (rfix_mx H).
Lemma normal_rfix_mx_module H : H <| G -> mxmodule (rfix_mx H).
Lemma rfix_mx_module : mxmodule (rfix_mx G).
Definition cyclic_mx u := <<E_G *m lin_mul_row u>>%MS.