The Lean 4 theorem `norm_shiftMap_ge` in the `ChapterHashimotoShiftInvert` chapter of the timepiece formalization

-- Generated from ChapterHashimotoShiftInvert.lean — theorem BookProof.HashimotoShiftInvert.norm_shiftMap_ge
import Definitions.Def_ChapterFarisLavine
import Definitions.Def_ChapterYangMillsFriedrichs
import Definitions.Def_ChapterYangMillsFriedrichsLimit
import Definitions.Def_ChapterHermiteGalerkinFriedrichs
import Mathlib
import Definitions.Def_ChapterHashimotoShiftInvert
import Definitions.Def_ChapterFarisLavineCore
import Definitions.Def_ChapterComplexShiftCore
open BookProof.HashimotoShiftInvert

variable {F : Type*} [NormedAddCommGroup F] [InnerProductSpace ℂ F] {Dom : Submodule ℂ F}



open BookProof.FarisLavine BookProof.YangMillsFriedrichs BookProof.YangMillsFriedrichsLimit
open BookProof.HermiteGalerkin
open Filter Topology

theorem BookProof.HashimotoShiftInvert.norm_shiftMap_ge {A : Dom →ₗ[ℂ] F} (hpos : ∀ x : Dom, 0 ≤ quadForm A x)
    {γ : ℝ} (x : Dom) :
    γ * ‖(x : F)‖ ≤ ‖shiftMap A γ x‖ := by sorry