Theorem: Matroid.dual_coloop_iff_loop (Matroid/Loop.lean)

State before:
α : Type u_1
β : Type u_2
M N : Matroid α
e f : α
B L L' I X Y Z F C K : Set α
h : M✶.Coloop e
⊢ M.Loop e
Tactic:
rw [← dual_dual M]
State after:
α : Type u_1
β : Type u_2
M N : Matroid α
e f : α
B L L' I X Y Z F C K : Set α
h : M✶.Coloop e
⊢ M✶✶.Loop e

State before:
α : Type u_1
β : Type u_2
M N : Matroid α
e f : α
B L L' I X Y Z F C K : Set α
h : M✶.Coloop e
⊢ M✶✶.Loop e
Tactic:
exact h.dual_loop
State after:
no goals