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 Nov 24 awarded Popular Question Nov 17 awarded Popular Question Oct 8 awarded Popular Question Mar 22 asked What are some real life applications of least squares problem? Mar 22 comment Changes in singular values of matrix when rows are added It gave me the most important idea to solve the entire problem :D Thanks so much!!! Mar 21 accepted Changes in singular values of matrix when rows are added Mar 21 comment Changes in singular values of matrix when rows are added Never mind. Sorry. I got it now. Mar 21 comment Changes in singular values of matrix when rows are added But the theorem requires that $B$ and $C$ are both square matrix. In this case, $A$ is NOT. $A \in R^{m \text{x} n}$ Mar 20 asked Changes in singular values of matrix when rows are added Mar 8 awarded Critic Mar 8 revised Trigonometry system - complex conjugate deleted 12 characters in body Mar 8 comment Trigonometry system - complex conjugate it doesn't answer my question! I know how to add exponents. Mar 8 comment Trigonometry system - complex conjugate I understand that part but should $e^{2πimt}e^{-2πint}=e^{2πi(m-n)t}$? Mar 8 asked Trigonometry system - complex conjugate Mar 4 asked How to compute QR decomposition of a product of matrices Mar 2 awarded Tumbleweed Feb 24 awarded Curious Feb 23 asked Apply Cayley transformation on vector x Feb 23 awarded Commentator Feb 23 awarded Supporter