Theorem: Matroid.singleton_flat (Matroid/Simple.lean)

State before:
α : Type u_1
M N : Matroid α
e f g : α
I X P D : Set α
inst✝ : M.Simple
he : autoParam (e ∈ M.E) _auto✝
⊢ M.Flat {e}
Tactic:
rw [← cl_singleton_eq]
State after:
α : Type u_1
M N : Matroid α
e f g : α
I X P D : Set α
inst✝ : M.Simple
he : autoParam (e ∈ M.E) _auto✝
⊢ M.Flat (M.cl {e})

State before:
α : Type u_1
M N : Matroid α
e f g : α
I X P D : Set α
inst✝ : M.Simple
he : autoParam (e ∈ M.E) _auto✝
⊢ M.Flat (M.cl {e})
Tactic:
apply cl_flat
State after:
no goals