finitediff::vec::hessian

Function forward_hessian_vec_prod_vec

Source 
pub fn forward_hessian_vec_prod_vec<F>(
    x: &Vec<F>,
    grad: &'_ dyn Fn(&Vec<F>) -> Result<Vec<F>, Error>,
    p: &[F],
) -> Result<Vec<F>, Error>
where
    F: Float,