English
There exists a star-algebra equivalence between the unitization and the adjoin under a suitable assumption.
Русский
Существует звездное алгебраическое эквивалентство между единичизацией и адъюнтом при подходящем допущении.
LaTeX
$$$\mathrm{Unitization}\;R\;s \simeq_{\star} \mathrm{StarAlgebra.adjoin}\;R\,(s)$$$
Lean4
theorem of_compHom :
letI := MulAction.compHom M (algebraMap R A : R →* A);
IsScalarTower R A M :=
letI := MulAction.compHom M (algebraMap R A : R →* A);
of_algebraMap_smul fun _ _ ↦ rfl