nevanlinna/Nevanlinna/comparingDerivatives.lean

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import Mathlib.Data.Fin.Tuple.Basic
import Mathlib.Analysis.Complex.Basic
import Mathlib.Analysis.Complex.TaylorSeries
import Mathlib.Analysis.Calculus.LineDeriv.Basic
import Mathlib.Analysis.Calculus.ContDiff.Defs
import Mathlib.Analysis.Calculus.FDeriv.Basic
import Mathlib.Analysis.Calculus.FDeriv.Symmetric
lemma l₁ (f : × ) (h : ContDiff 2 f) :
∀ z a b : × , (fderiv (fun w => fderiv f w) z) a b = iteratedFDeriv 2 f z ![a, b] := by
sorry
lemma l₂ (f : × ) (h : ContDiff 2 f) :
∀ z a b : × , (fderiv (fun w => fderiv f w) z) a b = (fderiv (fun w ↦ (fderiv f w) a) z) b := by
sorry