attention mechanism is also a universal approximator they make big use of star graphs what they say is okay if we have a star graph which is one node connected right here to every other node this is a star graph if we have a star graph we can achieve the same thing than with a full graph a full graph is where every node is connected to every other node but as i already said what they need for this is multiple layers of this star graph so and that has to do with the fact that if i want to route information i basically have to go via this