Function linxal::properties::is_triangular

pub fn is_triangular<T, D>(mat: &ArrayBase<D, Ix2>, uplo: Symmetric) -> bool where
    T: LinxalImplScalar,
    D: Data<Elem = T>, 

Return true iff the matrix is triangular / trapezoidal, with the side specified by uplo.

Uses the defalut toleranace for comparisons to 0.