a positive definite matrix

 

https://en.wikipedia.org/wiki/Definite_quadratic_form

 

 

 

 

 

https://www.math.utah.edu/~zwick/Classes/Fall2012_2270/Lectures/Lecture33_with_Examples.pdf

 

 

 

 

 

posted @ 2017-09-28 20:44  papering  阅读(238)  评论(0)  编辑  收藏  举报