English
If α and γ are finite, then G is finite.
Русский
Если α и γ конечны, то G конечен.
LaTeX
$$$[Finite\ α] [Finite\ γ] \Rightarrow Finite G$$$
Lean4
/-- All `FunLike`s are finite if their domain and codomain are.
Non-dependent version of `DFunLike.finite` that might be easier to infer.
Can't be an instance because it can cause infinite loops.
-/
theorem finite [Finite α] [Finite γ] : Finite G :=
DFunLike.finite G