refine ext (G := rootsOfUnity n L) rfl ?_
L : Type u
inst✝ : Field L
n : ℕ+
⊢ χ n (RingEquiv.refl L) = 1
L : Type u
inst✝ : Field L
n : ℕ+
⊢ ∀ (t : { x // x ∈ rootsOfUnity n L }), t ^ ZMod.val (χ n (RingEquiv.refl L)) = t ^ ZMod.val 1