Abstract
This paper analyses a necessary and sufficient optimality condition for quadratic pseudo-Boolean unconstrained problems. It is proved that in general testing any necessary and sufficient optimality condition is a difficult task for anyNP-hard problem. Anɛ-optimality condition is derived together with an approximation scheme to test it.
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This work has been supported by the “Progetto Finalizzato Trasporti 2”, 93.01799.PF74.
Professor Paolo Carraresi died unexpectedly on March 5, 1994. At the time of his death this paper had been completed. While undertaking the final revision, the other two authors were reminded just how much they were indebted to Professor Carraresi after many years of common work together.
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Carraresi, P., Malucelli, F. & Pappalardo, M. Testing optimality for quadratic 0–1 unconstrained problems. ZOR - Methods and Models of Operations Research 42, 295–311 (1995). https://doi.org/10.1007/BF01432506
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DOI: https://doi.org/10.1007/BF01432506