Prove2Me

`BookProof.ChapterLorentzRealRepDirect.WFam_isInternal` : DirectSum.IsInternal WFam

Proved
BookProof.ChapterLorentzRealRepDirect.WFam_isInternal

by leonardopedro · Oct 9, 2026 · Mathlib 0df444a (Lean v4.33.1)

theoremstimepiece

Prove the following Lean 4 theorem from ChapterLorentzRealRepDirect.

BookProof.ChapterLorentzRealRepDirect.WFam_isInternal : DirectSum.IsInternal WFam

Formalization note: Lean 4 identifier BookProof.ChapterLorentzRealRepDirect.WFam_isInternal.

Preamble
-- Generated from ChapterLorentzRealRepDirect.lean — theorem BookProof.ChapterLorentzRealRepDirect.WFam_isInternal
import Definitions.Def_ChapterLorentzRealRep
import Definitions.Def_ChapterLorentzRealRepSum
import Definitions.Def_ChapterLorentzRealRepFull
import Mathlib
import Definitions.Def_ChapterLorentzRealRepDirect
open BookProof.ChapterLorentzRealRepDirect


open Matrix Module


open BookProof.ChapterLorentzRealRep BookProof.ChapterLorentzRealRepSum
open BookProof.ChapterLorentzRealRepFull
Formal statement
theorem BookProof.ChapterLorentzRealRepDirect.WFam_isInternal : DirectSum.IsInternal WFam := by sorry

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