Section OneRepresentation.
Variables (n : nat) (rG : mx_representation aF G n).
Local Notation rGf := (map_repr f rG).
End OneRepresentation.

Lemma map_section_repr n (rG : mx_representation aF G n) rGf U V
(modU : mxmodule rG U) (modV : mxmodule rG V)
(modUf : mxmodule rGf U^f) (modVf : mxmodule rGf V^f) :
map_repr f rG =1 rGf ->
mx_rsim (map_repr f (section_repr modU modV)) (section_repr modUf modVf).