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Two remarks on copositive matrices. (English) Zbl 0185.08004


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[1] Baumert, L. D., Extreme copositive quadratic forms, Pac. J. Math., 19, 197-204 (1966) · Zbl 0145.25501
[2] Baumert, L. D., Extreme copositive quadratic forms II, Pac. J. Math., 20, 1-20 (1967) · Zbl 0189.32904
[3] Cottle, R. W.; Habetler, G. J.; Lemke, C. E., Quadratic forms semi-definite over convex cones, Proceedings of the International Symposium on Mathematical Programming, Princeton (1967), to appear in · Zbl 0221.15018
[4] Diananda, P. H., On nonnegative forms in real variables some or all of which are nonnegative, Proc. Cambridge Philos. Soc., 58, 17-25 (1962) · Zbl 0108.04803
[5] Hall, M., Combinatorial Theory (1967), Blaisdell: Blaisdell Waltham, Mass · Zbl 0196.02401
[6] Hall, M.; Newman, M., Copositive and completely positive quadratic forms, Proc. Cambridge Philos. Soc., 59, 329-339 (1963) · Zbl 0124.25302
[7] Motzkin, T. S., Copositive quadratic forms, National Bureau of Standards Rept. No. 1818, 11-12 (1952)
[8] Motzkin, T. S.; Straus, E. G., Maxima for graphs and a new proof of a theorem of Turan, Can. J. Math., 17, 533-540 (1965) · Zbl 0129.39902
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