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《Pure and Applied Mathematics》 2001-01
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The almost positive subdefinite matrix

YUAN Hui ping (Department of Mathematics,Yuzhou University, Chongqing 400033)  
The concept of almost positive subdefinite matrix is given, the basic property that it and its Hadamard product and Kronecker product has been discussed.The symmetric positive definite matrix of Schurs theorem , Hua Luogeng's theorem and Openheims inequality are extended to almost positive subdefinite matrix, and various kind positive subdefinite matrix to have unified.
【Fund】: 重庆市教委科学基金资助项目!(19980 10 2)
【CateGory Index】: O151.21
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