Trait Field
mathru::algebra::abstr
pub trait Field: Ring + Sub<Self, Output = Self> + SubAssign<Self> + Sign + Div<Self, Output = Self> + DivAssign<Self> + Abs { fn epsilon() -> Self; }
Field
https://en.wikipedia.org/wiki/Field_(mathematics)
fn epsilon() -> Self
impl Field for f32
impl Field for f64
impl<T> Field for Complex<T> where T: Real,
fn epsilon() -> Complex<T>