Question on eval_atom_derivative function.
Hello again,
So I am working on incorporating pseudocontact shifts into the Relax protocol and I need to implement the derivatives for minimization. As I understand it, to do this I need to implement the eval_atom_derivative function. However, I do not understand the vector parameters F1 and F2. Could you explain them to me? Are they just the vector along the gradient for the atom?
Thank you in advance.