1-helium-variational-calculus.jpg<br>
<P><img src="1-helium-variational-calculus.jpg"><br>
2-ground-state-function-absolute-minimum.jpg<br>
<P><img src="2-ground-state-function-absolute-minimum.jpg"><br>
3-variable-effective-Z-energy.jpg<br>
<P><img src="3-variable-effective-Z-energy.jpg"><br>
4-excited-states-triplet.jpg<br>
<P><img src="4-excited-states-triplet.jpg"><br>
5-excited-states-energy-terms.jpg<br>
<P><img src="5-excited-states-energy-terms.jpg"><br>
6-direct-and-exchange-term.jpg<br>
<P><img src="6-direct-and-exchange-term.jpg"><br>