`BookProof.ChapterA.Qanti_anticommutes_mulI` (S : V →L[ℝ] V) (x : V) : Qanti S (Complex.I • x) = -(Complex.I • Qanti S x)

Proved

BookProof.ChapterA.Qanti_anticommutes_mulI

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

theoremstimepiece

Prove the following Lean 4 theorem from ChapterA2c.

BookProof.ChapterA.Qanti_anticommutes_mulI (S : V →L[ℝ] V) (x : V) : Qanti S (Complex.I • x) = -(Complex.I • Qanti S x)

Formalization note: Lean 4 identifier BookProof.ChapterA.Qanti_anticommutes_mulI.

Preamble

-- Generated from ChapterA2c.lean — theorem BookProof.ChapterA.Qanti_anticommutes_mulI
import Mathlib
import Definitions.Def_ChapterA2c
import Definitions.Def_ChapterA
open BookProof.ChapterA


open scoped ComplexConjugate InnerProductSpace Quaternion


variable {V : Type*} [NormedAddCommGroup V] [InnerProductSpace ℂ V] [CompleteSpace V]

Formal statement

theorem BookProof.ChapterA.Qanti_anticommutes_mulI (S : V →L[ℝ] V) (x : V) :
    Qanti S (Complex.I • x) = -(Complex.I • Qanti S x) := by sorry

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