Trait Ring
mathru::algebra::abstr
pub trait Ring: Semiring + Neg<Output = Self> { }
Ring
https://en.wikipedia.org/wiki/Ring_(mathematics)
impl Ring for isize
impl Ring for i8
impl Ring for i16
impl Ring for i32
impl Ring for i64
impl Ring for f32
impl Ring for f64
impl<T> Ring for Complex<T> where T: Real,