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《Journal of Anhui Normal University(Natural Science)》 2003-03
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A NECESSARY AND SUFFICIENT CONDITION FOR THE PARTIAL VARIABLE POSITIVE DEFINITE ABOUT QUADRIC FORM

LI Jifeng1,YE Baiying2 (1.Baoshan Branch School, Shanghai Television University, Shanghai 200940;2. Shanghai Xinzhi College, Shanghai 200940,China)  
Liapunov function about the partial variable positive definite is a powerful tool which studies the system of partial variable stability. In this paper,we introduce the concept of partial variable positive definite, and study a necessary and sufficient condition for the partial variable positive definite about quadric form . Here we list several necessary conditions that help to make judyment.
【CateGory Index】: O174
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【Co-citations】
Chinese Journal Full-text Database 10 Hits
1 ZHAN Shi-lin(Department of Mathematics,Hanshan Teachers College,Chaozhou521041,China);On the positive definiteness of the product of matrices[J];Journal of Anhui University(Natural Sciences);2003-02
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