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Tim Davis
01: direct methods for sparse linear systems (lecture 1 of 42)
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Janusz
办美国文凭加拿大文凭澳洲文凭英国文凭学位证毕业证成绩单
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Wendy Ye
![Let A=[[ 1 2 -1; 2 1 4 ]], B=[\\\\beginarr…](http://i.ytimg.com/vi/_RKSt51IZAY/mqdefault.jpg "Let A=[[ 1 2 -1; 2 1 4 ]], B=[\\\\beginarr…")
![1.92 2x2 Average [PR]](http://i.ytimg.com/vi/pjAQOtstK7A/mqdefault.jpg "1.92 2x2 Average [PR]")
![Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3](http://i.ytimg.com/vi/B7UwIYXEcX8/mqdefault.jpg "Prove that |[1 +a^2 -b^2, 2ab, -2b],[2ab, 1-a^2 +b^2, 2a],[2b, -2a, 1-a^2 -b^2]| = (1 + a^2 + b^2)^3")
