message: using default value of array now
diff: @@ -33,7 +33,7 @@ impl<'a> NewtonState<'a> {
  pub fn new() -> Self {
  NewtonState {
  problem: None,
  - param: Array1::from_vec(vec![0.0]),
  + param: Array1::default(1),
  iter: 0_u64,
  }
  }
  