rfl
case succ
R : Type u
a✝ b : R
m n✝ : ℕ
inst✝ : Semiring R
φ : R →+* R
p q : R[X;φ]
a : AddMonoidAlgebra R ℕ
n : ℕ
n_ih : { toFinsupp := SkewPolynomial.AddMonoidAlgebra.pow' φ n a } = npowRec n { toFinsupp := a }
⊢ { toFinsupp := SkewPolynomial.AddMonoidAlgebra.pow' φ (Nat.succ n) a } =
    { toFinsupp := AddMonoidAlgebra.mul' φ a (SkewPolynomial.AddMonoidAlgebra.pow' φ n a) }
no goals