The Lean 4 theorem `laplacian_deficiency_trivial_negI` in the `ChapterSchrodingerCutoffEsa` chapter of the timepiece formalization

-- Generated from ChapterSchrodingerCutoffEsa.lean — theorem BookProof.SchrodingerCutoff.laplacian_deficiency_trivial_negI
import Mathlib
import Definitions.Def_ChapterSchrodingerCutoffEsa
open BookProof.SchrodingerCutoff



open MeasureTheory Filter Complex

theorem BookProof.SchrodingerCutoff.laplacian_deficiency_trivial_negI
    (u u' u'' : ℝ → ℂ)
    (h1 : ∀ x, HasDerivAt u (u' x) x)
    (h2 : ∀ x, HasDerivAt u' (u'' x) x)
    (heq : ∀ x, -u'' x = -Complex.I * u x)
    (hL2 : Integrable fun x => ‖u x‖ ^ 2) :
    u = 0 := by sorry