∀ {R : Type u_1} [inst : CommSemiring R] {M₁ : Type u_2} {M₂ : Type u_3} {M : Type u_4} [inst_1 : AddCommMonoid M₁]
  [inst_2 : AddCommMonoid M₂] [inst_3 : AddCommMonoid M] [inst_4 : Module R M₁] [inst_5 : Module R M₂]
  [inst_6 : Module R M] (f : M₁ →ₗ[R] M₂ →ₗ[R] M), IsTensorProduct f = Function.Bijective ⇑(TensorProduct.lift f)