Section IsoFunctorTheory.
Implicit Types gT rT : finGroupType.
Variable F : GFunctor.iso_map.

Lemma gFisom gT rT (G D : {group gT}) R (f : {morphism D >-> rT}) :
G \subset D -> isom G (gval R) f -> isom (F gT G) (F rT R) f.