Module: Mathlib.AlgebraicGeometry.Gluing

Goal state before:
pp: J : Type w
inst✝⁴ : Category.{v, w} J
F : J ⥤ Scheme
inst✝³ : ∀ {i j : J} (f : i ⟶ j), IsOpenImmersion (F.map f)
inst✝² : (F ⋙ forget).IsLocallyDirected
inst✝¹ : Quiver.IsThin J
inst✝ : Small.{u, w} J
i j k : Shrink.{u, w} J
x : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
l : J
fi : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
fj : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
fk : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
α : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
z : ↥(F.obj l)
hα : IsOpenImmersion α
hα₁ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
hα₂ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
e : α z = x
pf✝⁵ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
h₁ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝⁴ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝³ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝² : IsOpenImmersion (F.map fi)
pf✝¹ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
⊢ failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)

Tactic:
have : IsOpenImmersion.lift (V F ↓j ↓k).ι (F.map fj) h₁ = (F.map fj).isoOpensRange.hom ≫
        (F.obj ↓j).homOfLE (le_iSup_of_le ⟨l, fj, fk⟩ le_rfl) := by
      rw [← cancel_mono (Scheme.Opens.ι _), Category.assoc, IsOpenImmersion.lift_fac,
        ← Iso.inv_comp_eq, Scheme.Hom.isoOpensRange_inv_comp]
      exact (Scheme.homOfLE_ι _ _).symm

Goal state after:
J : Type w
inst✝⁴ : Category.{v, w} J
F : J ⥤ Scheme
inst✝³ : ∀ {i j : J} (f : i ⟶ j), IsOpenImmersion (F.map f)
inst✝² : (F ⋙ forget).IsLocallyDirected
inst✝¹ : Quiver.IsThin J
inst✝ : Small.{u, w} J
i j k : Shrink.{u, w} J
x : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
l : J
fi : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
fj : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
fk : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
α : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
z : ↥(F.obj l)
hα : IsOpenImmersion α
hα₁ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
hα₂ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
e : α z = x
pf✝⁵ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
h₁ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝⁴ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝³ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝² : IsOpenImmersion (F.map fi)
pf✝¹ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
pf✝ : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
this : failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)
⊢ failed to pretty print expression (use 'set_option pp.rawOnError true' for raw representation)