also a problem that have been studied so in order to make the the kind of computational question more interesting i mix them and if i mix them then you see what's going on there is this algorithmically hard phase appearing that we believe cannot be entered by any polynomial algorithm that's a conjecture and now all i want to be telling you about how is how bad and decent and longivan dynamics fits in this diagram you know does it do as good as the approximate message fasting does it do worse why so to define