`BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc` (g : C(spectrum ℂ T, ℂ)) (u : Lp ℂ 2 (spectralMeasure T hT xi)) : cyclicEmbedding T hT xi (mulRep (spectralMeas

Proved

BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc

by leonardopedro · Oct 17, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterSpectralDirectSum.

BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc (g : C(spectrum ℂ T, ℂ)) (u : Lp ℂ 2 (spectralMeasure T hT xi)) : cyclicEmbedding T hT xi (mulRep (spectralMeasure T hT xi) g u) = cfcHom hT g (cyclicEmbedding T hT xi u)

Formalization note: Lean 4 identifier BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc.

Preamble

-- Generated from ChapterSpectralDirectSum.lean — theorem BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc
import Definitions.Def_ChapterAbelianGelfandModel
import Definitions.Def_ChapterSpectralMultiplication
import Definitions.Def_ChapterCyclicDecomposition
import Definitions.Def_ChapterCyclicDirectSum
import Mathlib
import Definitions.Def_ChapterSpectralDirectSum
open BookProof.ChapterSpectralDirectSum


noncomputable section

open MeasureTheory Complex


open BookProof.ChapterAbelianGelfandModel BookProof.ChapterSpectralMultiplication
open BookProof.ChapterCyclicDecomposition BookProof.ChapterCyclicDirectSum

variable {H : Type*} [NormedAddCommGroup H] [InnerProductSpace ℂ H] [CompleteSpace H]
variable (T : H →L[ℂ] H) (hT : IsStarNormal T) (xi : H)

Formal statement

theorem BookProof.ChapterSpectralDirectSum.cyclicEmbedding_intertwines_cfc (g : C(spectrum ℂ T, ℂ))
    (u : Lp ℂ 2 (spectralMeasure T hT xi)) :
    cyclicEmbedding T hT xi (mulRep (spectralMeasure T hT xi) g u)
      = cfcHom hT g (cyclicEmbedding T hT xi u) := by sorry

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