`BookProof.ChapterA.conjFixed_isClosed` (θ : AntiUnitary V) : IsClosed ((conjFixed θ : Submodule ℝ V) : Set V)

Proved

BookProof.ChapterA.conjFixed_isClosed

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

theoremstimepiece

Prove the following Lean 4 theorem from ChapterA1f.

BookProof.ChapterA.conjFixed_isClosed (θ : AntiUnitary V) : IsClosed ((conjFixed θ : Submodule ℝ V) : Set V)

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

Preamble

-- Generated from ChapterA1f.lean — theorem BookProof.ChapterA.conjFixed_isClosed
import Mathlib
import Definitions.Def_ChapterA1f
import Definitions.Def_ChapterA1
import Definitions.Def_ChapterA
open BookProof.ChapterA
open BookProof.ChapterA


open scoped ComplexConjugate InnerProductSpace RealInnerProductSpace


attribute [local instance] InnerProductSpace.rclikeToReal

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

Formal statement

theorem BookProof.ChapterA.conjFixed_isClosed (θ : AntiUnitary V) :
    IsClosed ((conjFixed θ : Submodule ℝ V) : Set V) := by sorry

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