at reward and dynamics model and then this and rewarding dynamic smaller can do a recurrent calculation to get out the value of each state so this is just a recurrent calculation repeating applying the same operation so some recurring moment and it's a return on that work with local calculation because states next to each other can be visited from each other and happen to show off in this dynamic programming calculation so turns out that there is a recurrent component is enough to represent validation calculation but we don't need