English
There is an auxiliary abelian-equivalence abelianAux between Action V G and the functor category (SingleObj G) ⥤ V.
Русский
Существует вспомогательная абелева экваленция abelianAux между Action V G и категорией функторов (SingleObj G) ⥤ V.
LaTeX
$$$\text{abelianAux} : \mathrm{Action}(V,G) \simeq \mathrm{Functor}(\mathrm{SingleObj}(G), V)$$$
Lean4
/-- Auxiliary construction for the `Abelian (Action V G)` instance. -/
def abelianAux : Action V G ≌ (SingleObj G) ⥤ V :=
functorCategoryEquivalence V G