The concept of quasi positive sub-definite matrix is giv en.Its basic properties have been discussed.A lot of new results have been obtai ned.The Schur's theorem of symmetric positive definite matrix,Hua Luo-geng theor em and Openheim inequality are gener
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袁晖坪 罗长青 刁善会.关于拟次正定矩阵[J].重庆工商大学学报(自然科学版),2001,(3): YUAN Hui-ping,?LUO Chang-qing,?DIAO Shan-hui. On Quasi Positive Sub-definite Matrix[J]. Journal of Chongqing Technology and Business University(Natural Science Edition),2001,(3):