x over which i'm optimizing and some terms depend on it in a trivial way if the x lives on the sphere they're just equal to some constant so the only non-trivial term that matters is the term here i called h of x that if i look back in statistical physics is exactly the hamiltonian of something that is called the spherical mix b spin glass so those in the audience that know about spin glasses have seen this smile because that's the one one of those that is most often studied in the field of statistical physics of disordered