no goals
Γ : Type u_3
R : Type u_2
inst✝¹ : PartialOrder Γ
inst✝ : AddCommMonoid R
α : Type u_1
f1 : α → HahnSeries Γ R
hU1 : Set.IsPwo (⋃ (a : α), support (f1 a))
hf1 : ∀ (g : Γ), Set.Finite {a | coeff (f1 a) g ≠ 0}
f2 : α → HahnSeries Γ R
isPwo_iUnion_support'✝ : Set.IsPwo (⋃ (a : α), support (f2 a))
finite_co_support'✝ : ∀ (g : Γ), Set.Finite {a | coeff (f2 a) g ≠ 0}
h :
  { toFun := f1, isPwo_iUnion_support' := hU1, finite_co_support' := hf1 }.toFun =
    { toFun := f2, isPwo_iUnion_support' := isPwo_iUnion_support'✝, finite_co_support' := finite_co_support'✝ }.toFun
⊢ { toFun := f1, isPwo_iUnion_support' := hU1, finite_co_support' := hf1 } =
    { toFun := f2, isPwo_iUnion_support' := isPwo_iUnion_support'✝, finite_co_support' := finite_co_support'✝ }
congr