diff --git a/Nevanlinna/cauchyRiemann.lean b/Nevanlinna/cauchyRiemann.lean
index 243ad35..1884075 100644
--- a/Nevanlinna/cauchyRiemann.lean
+++ b/Nevanlinna/cauchyRiemann.lean
@@ -44,8 +44,10 @@ theorem CauchyRiemann₃ : (DifferentiableAt ℂ f z)
   simp
 
 
-theorem CauchyRiemann₄ {F : Type*} [NormedAddCommGroup F] [NormedSpace ℂ F] {f : ℂ → F} : (Differentiable ℂ f)
-  → partialDeriv ℝ Complex.I f = Complex.I • partialDeriv ℝ 1 f := by
+theorem CauchyRiemann₄
+  {F : Type*} [NormedAddCommGroup F] [NormedSpace ℂ F] 
+  {f : ℂ → F} : 
+  (Differentiable ℂ f) → partialDeriv ℝ Complex.I f = Complex.I • partialDeriv ℝ 1 f := by
   intro h
   unfold partialDeriv
 
diff --git a/Nevanlinna/holomorphic.primitive.lean b/Nevanlinna/holomorphic.primitive.lean
index 0ac5eae..591d91f 100644
--- a/Nevanlinna/holomorphic.primitive.lean
+++ b/Nevanlinna/holomorphic.primitive.lean
@@ -4,9 +4,7 @@ import Mathlib.MeasureTheory.Integral.DivergenceTheorem
 import Mathlib.MeasureTheory.Integral.IntervalIntegral
 import Mathlib.MeasureTheory.Function.LocallyIntegrable
 
-
 import Nevanlinna.cauchyRiemann
-import Nevanlinna.partialDeriv
 
 
 theorem MeasureTheory.integral2_divergence₃
@@ -108,7 +106,6 @@ theorem integral_divergence₅
     exact h₁f
 
   let A := integral_divergence₄ (-Complex.I • F) F h₁g h₁f lowerLeft.re upperRight.im upperRight.re lowerLeft.im
-
   have {z : ℂ} : fderiv ℝ F z Complex.I = partialDeriv ℝ _ F z := by rfl
   conv at A in (fderiv ℝ F _) _ => rw [this]
   have {z : ℂ} : fderiv ℝ (-Complex.I • F) z 1 = partialDeriv ℝ _ (-Complex.I • F) z := by rfl