exact h.mono inter_subset_left inter_subset_left
α : Type u_1
inst✝² : Fintype α
inst✝¹ : DecidableEq α
G : SimpleGraph α
inst✝ : DecidableRel G.Adj
s t : Finset α
a✝ : α
h : Disjoint s t
a : α
⊢ Disjoint (s ∩ G.neighborFinset a) (t ∩ G.neighborFinset a)
no goals