Theorem: PartialEquiv.copy_eq
File: Mathlib/Logic/Equiv/PartialEquiv.lean

Proof steps:
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
e✝ : PartialEquiv α β
e' : PartialEquiv β γ
e : PartialEquiv α β
f : α → β
hf : ↑e = f
g : β → α
hg : ↑e.symm = g
s : Set α
hs : e.source = s
t : Set β
ht : e.target = t
⊢ e.copy f hf g hg s hs t ht = e
state_after: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
e✝ : PartialEquiv α β
e' : PartialEquiv β γ
e : PartialEquiv α β
⊢ e.copy ↑e ⋯ ↑e.symm ⋯ e.source ⋯ e.target ⋯ = e
tactic: substs f g s t
state_before: α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
e✝ : PartialEquiv α β
e' : PartialEquiv β γ
e : PartialEquiv α β
⊢ e.copy ↑e ⋯ ↑e.symm ⋯ e.source ⋯ e.target ⋯ = e
state_after: case mk
α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
e : PartialEquiv α β
e' : PartialEquiv β γ
toFun✝ : α → β
invFun✝ : β → α
source✝ : Set α
target✝ : Set β
map_source'✝ : ∀ ⦃x : α⦄, x ∈ source✝ → toFun✝ x ∈ target✝
map_target'✝ : ∀ ⦃x : β⦄, x ∈ target✝ → invFun✝ x ∈ source✝
left_inv'✝ : ∀ ⦃x : α⦄, x ∈ source✝ → invFun✝ (toFun✝ x) = x
right_inv'✝ : ∀ ⦃x : β⦄, x ∈ target✝ → toFun✝ (invFun✝ x) = x
⊢ { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.copy
      ↑{ toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }
      ⋯
      ↑{ toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
            map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.symm
      ⋯
      { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.source
      ⋯
      { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.target
      ⋯ =
    { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
      map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }
tactic: cases e
state_before: case mk
α : Type u_1
β : Type u_2
γ : Type u_3
δ : Type u_4
e : PartialEquiv α β
e' : PartialEquiv β γ
toFun✝ : α → β
invFun✝ : β → α
source✝ : Set α
target✝ : Set β
map_source'✝ : ∀ ⦃x : α⦄, x ∈ source✝ → toFun✝ x ∈ target✝
map_target'✝ : ∀ ⦃x : β⦄, x ∈ target✝ → invFun✝ x ∈ source✝
left_inv'✝ : ∀ ⦃x : α⦄, x ∈ source✝ → invFun✝ (toFun✝ x) = x
right_inv'✝ : ∀ ⦃x : β⦄, x ∈ target✝ → toFun✝ (invFun✝ x) = x
⊢ { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.copy
      ↑{ toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }
      ⋯
      ↑{ toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
            map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.symm
      ⋯
      { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.source
      ⋯
      { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
          map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }.target
      ⋯ =
    { toFun := toFun✝, invFun := invFun✝, source := source✝, target := target✝, map_source' := map_source'✝,
      map_target' := map_target'✝, left_inv' := left_inv'✝, right_inv' := right_inv'✝ }
state_after: no goals
tactic: rfl