`BookProof.TwoParticleSector.isReducingProjection_fermionicProj` : IsReducingProjection (fermionicProj Hs)

Proved

BookProof.TwoParticleSector.isReducingProjection_fermionicProj

by leonardopedro · Oct 7, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterTwoParticleSectorEsa.

BookProof.TwoParticleSector.isReducingProjection_fermionicProj : IsReducingProjection (fermionicProj Hs)

Formalization note: Lean 4 identifier BookProof.TwoParticleSector.isReducingProjection_fermionicProj.

Preamble

-- Generated from ChapterTwoParticleSectorEsa.lean — theorem BookProof.TwoParticleSector.isReducingProjection_fermionicProj
import Definitions.Def_ChapterFarisLavine
import Definitions.Def_ChapterGraphCoreTransfer
import Definitions.Def_ChapterReducingSubspaceEsa
import Mathlib
import Definitions.Def_ChapterTwoParticleSectorEsa
import Definitions.Def_ChapterTensorGraphCore
open BookProof.TensorCore
open BookProof.TwoParticleSector



open scoped TensorProduct
open BookProof.FarisLavine BookProof.GraphCore BookProof.ReducedEsa BookProof.TensorCore

noncomputable section

variable (X : Type) [NormedAddCommGroup X] [InnerProductSpace ℂ X]
variable {X}
variable (Hs : IPSpace) (D₂ : Submodule ℂ Hs.carrier)
variable (A : D₂ →ₗ[ℂ] Hs.carrier)
variable (D : Submodule ℂ Hs.carrier)

Formal statement

theorem BookProof.TwoParticleSector.isReducingProjection_fermionicProj : IsReducingProjection (fermionicProj Hs) := by sorry

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