∀ (R : Type u_1) {A : Type u_2} {B : Type u_3} [inst : CommSemiring R] [inst_1 : AddCommMonoid B] [inst_2 : Module R B]
  [inst_3 : Coalgebra R B] (e : A ≃ B),
  LinearMap.lTensor A CoalgebraStruct.counit ∘ₗ CoalgebraStruct.comul = (TensorProduct.mk R A R).flip 1