`BookProof.ChapterGravityIrrep.frob_symTraceless_trace` (M : Matrix (Fin 3) (Fin 3) ℝ) : frobInner (symTracelessPart M) ((M.trace) • (1 : Matrix (Fin 3) (Fin 3) ℝ)) = 0

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`BookProof.ChapterGravityIrrep.frob_symTraceless_trace` (M : Matrix (Fin 3) (Fin 3) ℝ) : frobInner (symTracelessPart M) ((M.trace) • (1 : Matrix (Fin 3) (Fin 3) ℝ)) = 0 · Prove2Me