English
There is a distributive scalar action of S on Derivation(R,A,M) turning it into a DistribMulAction, compatible with the underlying addition and scalar action on M.
Русский
Существует распределенное скалярное действие S на Derivation(R,A,M), превращающее его в DistribMulAction, совместимое с сложением и действием на M.
LaTeX
$$$\mathrm{Derivation}(R,A,M)$ equipped with the action $(s,D) \mapsto s • D$ is a DistribMulAction over S.$$
Lean4
instance : DistribMulAction S (Derivation R A M) :=
Function.Injective.distribMulAction coeFnAddMonoidHom coe_injective coe_smul