fn min {
	"Returns the number in its arguments that is closest to negative infinity."
	(x as :number) -> x
	(x as :number, y as :number) -> if base :lt? (x, y) then x else y
	(x, y, ...zs) -> (min, zs, min (x, y)) 
}

fn lt? (x as :number, y as :number) -> base :lt? (x, y)

#{min, lt?}