Upper and Lower bounds for a certain class of constrained variational problems
Morgan A Hanson · Journal of the Australian Mathematical Society · 1963
Certain optimization problems involving inequality constraints, known as optimal control problems have been extensively studied during recent years especially in relation to the calculation of optimal rocket thrusts and trajectories. A summary of these works is given by Berkovitz [1] who also establishes necessary conditions for the existence of solutions for a wide class of such problems.