Underlying all complex multiphysics simulations are even more complex mathematical algorithms that solve the equations describing movement of physical phenomena—for instance, the radiation diffusion and burning plasma processes inherent in fusion reactions. Preconditioned solvers are often used in these algorithms to transform a problem so that it quickly and accurately converges to a solution.Underlying all complex multiphysics simulations are even more complex mathematical algorithms that solve the equations describing movement of physical phenomena—for instance, the radiation diffusion and burning plasma processes inherent in fusion reactions. Preconditioned solvers are often used in these algorithms to transform a problem so that it quickly and accurately converges to a solution.[#item_full_content]