Typo in Belief Propagation file

[gubbilubbi]

Hi,

To begin with I would just like to say thank you for the fantastic material on this Github! Really wonderful and it has some great explanations of difficult topics.

However, I think I found a typo in the Belief Propagation file. If you scroll down to "Variable elimination over a junction tree" it says in the fourth paragraph that "Then we marginalize out x_(-k) to obtain a factor m_(j->k)(S_(ij))

I believe that it instead of S_(ij) should be S(jk)

Almost the same is done further down where it says m_(l->k)(S_(ij)) instead of m_(l->k)(S_(lk))

All the best
//Valter