English
For any index type ι and m: ι → M, the left-map is equal to mulMap composed with rTensor and finsupp scalars.
Русский
Для любого индекса ι и семейства m: ι → M, левое отображение равно mulMap, композиции rTensor и finsupp-скалярирования.
LaTeX
$$mulLeftMap N m = mulMap M N ∘ₗ LinearMap.rTensor N (Finsupp.linearCombination R m) ∘ₗ (TensorProduct.finsuppScalarLeft R N ι).symm.toLinearMap$$
Lean4
theorem mulRightMap_eq_mulMap_comp {ι : Type*} [DecidableEq ι] (n : ι → N) :
mulRightMap M n =
mulMap M N ∘ₗ
LinearMap.lTensor M (Finsupp.linearCombination R n) ∘ₗ
(TensorProduct.finsuppScalarRight R M ι).symm.toLinearMap :=
by ext; simp