I am a bit confused in my game theory class when it comes to finding correlated equilibria. I understand how to write the constraints using probability distributions, but I don't know how to find the extremal points when this is all said and done. In one example, my teacher did as follows:
I do not understand this technique and was hoping someone could explain it to me. Why are we putting constants in front of the payoffs? How do we know that this gives us the extremal points that define the convex set?