Theorem: Matroid.Minor.eq_con_del (Matroid/Minor/Basic.lean)

State before:
α : Type u_1
M M' N : Matroid α
e f : α
I J R B X Y Z K : Set α
M₀ M₁ M₂ : Matroid α
h : N ≤m M
⊢ N = M ／ h.C ＼ h.D
Tactic:
obtain ⟨-,-,-,h⟩ := h.exists_contract_indep_delete_coindep.choose_spec.choose_spec
State after:
case intro.intro.intro
α : Type u_1
M M' N : Matroid α
e f : α
I J R B X Y Z K : Set α
M₀ M₁ M₂ : Matroid α
h✝ : N ≤m M
h : N = M ／ ⋯.choose ＼ ⋯.choose
⊢ N = M ／ h✝.C ＼ h✝.D

State before:
case intro.intro.intro
α : Type u_1
M M' N : Matroid α
e f : α
I J R B X Y Z K : Set α
M₀ M₁ M₂ : Matroid α
h✝ : N ≤m M
h : N = M ／ ⋯.choose ＼ ⋯.choose
⊢ N = M ／ h✝.C ＼ h✝.D
Tactic:
exact h
State after:
no goals