As we were rigting the book, we noticed that there were certain problems which the ard and the pithan lined up exactly. There were some problems where we had to reformulate the mathematics because the way to do it in r was so different to the way you do it in pythan. I thought that was reareallin eat. My favorite chapter on this is the one that that is your specialty. G, the discreet event simulation chapter,. Theoretic ideas about discret event simulation a process based on what teloe. So this at olters, process based. And there's the event ed willin approach, there's two different ways of approaching discret vets