This method is the bound constrained variant of the LMVM method for
unconstrained optimization. It uses projected gradients to approximate
the Hessian -- eliminating the need for Hessian evaluations.
The method can be set using TaoMethod tao_blmvm.
The command TaoLMVMSetSize(), which sets the number
of vectors to be used in the Hessian approximation,
also applies to this method.