`BookProof.PermSector.permOp_mem_sectorCore` (n : ℕ) (σ : Equiv.Perm (Fin n)) {x : (Hs.pow n).carrier} (hx : x ∈ sectorCore Hs D₂ D n) : permOp Hs n σ x ∈ sectorCore Hs D₂ D n

Initializing...

`BookProof.PermSector.permOp_mem_sectorCore` (n : ℕ) (σ : Equiv.Perm (Fin n)) {x : (Hs.pow n).carrier} (hx : x ∈ sectorCore Hs D₂ D n) : permOp Hs n σ x ∈ sectorCore Hs D₂ D n · Prove2Me