var RealNumber: TypeAlias = int | float

var Number: TypeAlias = RealNumber | complex

var SingleVar = TypeVar('SingleVar', bound=Number)

var ArrayVar = TypeVar('ArrayVar', bound=Iterable[Number])

var Var: TypeAlias = SingleVar | ArrayVar

var OneSingleVarFunc: TypeAlias = Callable[[SingleVar], SingleVar]

var OneArrayFunc: TypeAlias = Callable[[ArrayVar], ArrayVar]

var OneVarFunc: TypeAlias = OneSingleVarFunc | OneArrayFunc

var TwoSingleVarsFunc: TypeAlias = Callable[[SingleVar, SingleVar], SingleVar]

var TwoArraysFunc: TypeAlias = Callable[[ArrayVar, ArrayVar], ArrayVar]

var TwoVarsFunc: TypeAlias = TwoSingleVarsFunc | TwoArraysFunc

var ThreeSingleVarsFunc: TypeAlias = Callable[[SingleVar, SingleVar, SingleVar], SingleVar]

var ThreeArraysFunc: TypeAlias = Callable[[ArrayVar, ArrayVar, ArrayVar], ArrayVar]

var ThreeVarsFunc: TypeAlias = ThreeSingleVarsFunc | ThreeArraysFunc

var MultiSingleVarsFunc: TypeAlias = Callable[..., SingleVar]

var MultiArraysFunc: TypeAlias = Callable[..., ArrayVar]

var MultiVarsFunc: TypeAlias = MultiSingleVarsFunc | MultiArraysFunc