really powerful okay but our notion of efficiency here is this class P poly so efficiency for algorithms is just the class P P poly is a set of problems solvable with one of these infinite circuit families so separate circuits ease of in for each input length where for every end the size of the in circuit is some polynomial in it this polynomial is fixed once and for all let's say it's N squared and so this circuit sees up a thousand be a thousand squared sighs okay so this is our notion of efficiency here for this or infinite