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`BookProof.PermSector.corePow_permOp` (n : ℕ) (σ : Equiv.Perm (Fin n)) {t : ((domSpace Hs D₂).pow n).carrier} (ht : t ∈ corePow Hs D₂ D n) : permOp (domSpace Hs D₂) n σ t ∈ corePow · Prove2Me