`BookProof.ChapterCyclicDirectSum.starProjection_eq_of_hasSum` {ι : Type*} {V : ι → Submodule ℂ H} [∀ i, (V i).HasOrthogonalProjection] (hV : OrthogonalFamily ℂ (fun i => (V i)) fu

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`BookProof.ChapterCyclicDirectSum.starProjection_eq_of_hasSum` {ι : Type*} {V : ι → Submodule ℂ H} [∀ i, (V i).HasOrthogonalProjection] (hV : OrthogonalFamily ℂ (fun i => (V i)) fu · Prove2Me