English
The subtype memory of S satisfies the torus property: the scalar action on elements of S respects the tower with the ambient algebra.
Русский
Подмножество типа мем в рамках S удовлетворяет тензорному свойству: скалярное действие на элементы S сохраняет тензорное расширение относительно ALgDA.
LaTeX
$$IsScalarTower R', R (Subtype (mem S))$$
Lean4
instance [Semiring R'] [SMul R' R] [Module R' A] [IsScalarTower R' R A] : IsScalarTower R' R S :=
inferInstanceAs
(IsScalarTower R' R (toSubmodule S))
/- More general form of `Subalgebra.algebra`.
This instance should have low priority since it is slow to fail:
before failing, it will cause a search through all `SMul R' R` instances,
which can quickly get expensive.
-/