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`BookProof.NonnegSemigroup.isSelfAdjoint_semigroupS` (hT : IsNonnegSelfAdjoint T) (hsv : ∀ w : F, ((0 : F), w) ∈ T → w = 0) {t : ℝ} (ht : 0 ≤ t) : IsSelfAdjoint (semigroupS hT hsv · Prove2Me