English
If X has a G-action and is finite, then FintypeCat.of X inherits a G-action via MulAction.
Русский
Если X имеет действие G и является конечным, то FintypeCat.of X наследует действие G через MulAction.
LaTeX
$$$\text{FintypeCat.ofMulAction}(G,H) : \text{MulAction}(G, H)$$$
Lean4
/-- Bundles a finite type `H` with a multiplicative action of `G` as an `Action`. -/
def ofMulAction (G : Type*) (H : FintypeCat.{u}) [Monoid G] [MulAction G H] : Action FintypeCat G
where
V := H
ρ := @MulAction.toEndHom _ _ _ (by assumption)