∀ {τ : Type u_2} (σ : Type u_5) (R : Type u_6) [inst : CommSemiring R] [inst_1 : Fintype σ] [inst_2 : Fintype τ]
  [inst_3 : DecidableEq σ] [inst_4 : DecidableEq τ] {n : ℕ} (μ : n.Partition) (e : σ ≃ τ),
  (MvPolynomial.rename ⇑e) (MvPolynomial.msymm σ R μ) = MvPolynomial.msymm τ R μ