literature it usually involves taking the second-order limit like looking at a fusion limit of the system and there those are nice but but definitely technically complex what we want to do is take maybe a more of a robust optimization viewpoint where we basically said let's ask can we get sort of dynamic pricing to be near optimal across a wide range of system parameters okay so again I'll just tell you that the result in pictures so here what I'm doing is I'm picking one of the parameters let's say the exoticness