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A Gradient Projection Algorithm for Relaxation Methods

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3 Author(s)
Mohammed, John L. ; Artificial Intelligence Laboratory, Fair-child Central Research and Development, Palo Alto, CA 94304. ; Hummel, Robert A. ; Zucker, S.W.

We consider a particular problem which arises when apply-ing the method of gradient projection for solving constrained optimiza-tion and finite dimensional variational inequalities on the convex set formed by the convex hull of the standard basis unit vectors. The method is especially important for relaxation labeling techniques applied to problems in artificial intelligence. Zoutendijk's method for finding feasible directions, which is relatively complicated in general situations, yields a very simple finite algorithm for this problem. We present an extremely simple algorithm for performing the gradient projection and an independent verification of its correctness.

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Pattern Analysis and Machine Intelligence, IEEE Transactions on  (Volume:PAMI-5 ,  Issue: 3 )