The potential energy integrals are reduced to quadratures and the other integrals are expressed in closed form. In the general case the quadratic forms Qk determine many-electron functions formed from ...

Physics and Python stuff. Most of the videos here are either adapted from class lectures or solving physics problems. I really like to use numerical calculations without all the fancy programming ...

This paper provides a numerical technique for determining the parameters in a model expressible as the sum of exponentials. The essence of the method is to rewrite the model so that after ...