pub trait BaseNum: Scalar + Zero + One + Add<Self, Output = Self> + Sub<Self, Output = Self> + Mul<Self, Output = Self> + Div<Self, Output = Self> + Rem<Self, Output = Self> + AddAssign<Self> + SubAssign<Self> + MulAssign<Self> + DivAssign<Self> + RemAssign<Self> + PartialOrd + 'static { }