Development of this library ended roughly ten years ago. The algorithms used in this software create the PIPs very efficiently; however, the gradients of the potential are not available analytically. Finally, we note that Singular is another open-source software suite of codes to obtain permutationally invariant polynomials. And to the best of our knowledge analytical gradients are also not available in this software. Another class of invariant polynomials is Fundamental Invariants. These will be briefly discussed in the section on using PIPs as inputs to Neural Networks.