# h3now

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bio website thep3blog.wordpress.com location Brazil age 24 member for 1 year, 7 months seen Aug 13 at 2:16 profile views 13

I'm a enginnering student from Brazil.

# 6 Questions

 3 Why can I use the eigenvectors of a matrix to “decouple” each coordinate contribution? 3 $P_{1c} = AP$ , $P_{2c} = BP$. How to find $P$? (being that $A$ and $B$ are $3\times 4$ matrices and $P$ is a $4\times 1$ vector) 2 Prerequisites for learning kalman filtering 2 Least-squares solution to an over-defined probem. 1 Why don't $A^TAx = A^Tb$ and $Ax=b$ have the same solution?

# 64 Reputation

 +10 Prerequisites for learning kalman filtering +15 Why can I use the eigenvectors of a matrix to “decouple” each coordinate contribution? +5 Why don't $A^TAx = A^Tb$ and $Ax=b$ have the same solution? +5 Least-squares solution to an over-defined probem.

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# 7 Tags

 0 linear-algebra × 4 0 real-analysis 0 optimization × 2 0 analysis 0 reference-request 0 nonlinear-optimization 0 elementary-set-theory

# 11 Accounts

 Travel 131 rep 117 Mathematica 119 rep 8 Stack Overflow 93 rep 110 Mathematics 64 rep 7 Code Review 53 rep 6