`BookProof.QgPhysicalSectorIdentity.wsum_annIdx` (ω : ι → ℝ) (j : ι) : wsum ω (annIdx j) = ω j

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`BookProof.QgPhysicalSectorIdentity.wsum_annIdx` (ω : ι → ℝ) (j : ι) : wsum ω (annIdx j) = ω j · Prove2Me