The Gradient Projection Method under Mild Differentiability Conditions
Garth P. McCormick, Richard A. Tapia · SIAM Journal on Control · 1972
Consider the sequence obtained by applying the gradient projection method to the problem of minimizing a continuously differentiable functional over a closed convex subset of a real Hilbert space. In this paper we show that any cluster point of this sequence must be a constrained stationary point.