It's lacking. Their explanation for the greedy algo is great, less so for every other. By the end of the article, their 'explanations' degrade to speed analogies.
If I have the names right, your parent is looking for the derivation of "Optimal Power Flow", and its linearization "Linear/DC OPF".
If I have the names right, your parent is looking for the derivation of "Optimal Power Flow", and its linearization "Linear/DC OPF".