Goal:
  
  G1 : t
  G2 : t
  __view_subject_4_ : VSet.Subset (V G1) (V G2)
  __view_subject_5_ : EdgeSet.Subset (E G1) (E G2)
  ============================
   (s G1 == s G2 ->
    VSet.for_all
      (fun x : VSet.elt =>
       VSet.for_all (fun y : VSet.elt => lsp G1 x y == lsp G2 x y) (V G1))
      (V G1) -> full_subgraph G1 G2)


DEBUG:Going to execute:
<coq-core.plugins.ssreflect::ssrmove@1> $1 $2
DEBUG LTAC Evaluated term: EdgeSet.subset_spec
DEBUG LTAC Evaluated term: (iffLR (Q:=EdgeSet.Subset (E G1) (E G2))
                              (EdgeSet.subset_spec (E G1) (E G2))
                              _view_subject_)