pub fn inverse<S: Debug + PartialEq + Clone, const N: usize>(
items: &[S; N],
f: impl Fn(S, S) -> S,
e: S,
b: impl Fn(S) -> S,
) -> Result<(), &'static str>Expand description
Defines the inverse property.
An element b is the inverse of a if ab = e and ba = e for some identity element e.