Positivity with respect to the round cone. (English) Zbl 0297.15023


15A63 Quadratic and bilinear forms, inner products
15B48 Positive matrices and their generalizations; cones of matrices
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[1] HAYNSWORTH E. V., HOFFMAN A. J.: Two remarks on copositive matrices. Linear Algebra, 2, 1969, 387-392. · Zbl 0185.08004
[2] MOTZKIN T. S.: Copositive quadratic forms. National Bureau of Standards Rept. No 1818, 1952, 11-12.
[3] PENROSE R.: A generalized inverse for matrices. Proc. Cambridge Phil. Soc., 51, 1955, 406-413. · Zbl 0065.24603
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