An apparently difficult, yet small, integer program has been tested on what we believe to be is a most efficient computer system containing a group theoretic algorithm. Although a good solution was produced, the code did not converge in at most thirty seconds of UNIVAC 1108 time, and thus the integer program can serve as a principal test problem. The model represents a real world chemical blending situation and was received from E. I. DuPont DeNemours & Co., Inc.
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