Singular Value Decomposition (SVD)

• Least Squares Solutions of nxn Systems-If A is ill-conditioned or singular,SVD can give usaworkable solution in this case too: x =A−1b ≈VD−1 0 U T b • Homogeneous Systems-Suppose b=0, then the linear system is called homogeneous: Ax =0 (assume A is mxn and A =UDVT)-The minimum-norm solution in this case isx=0 (trivial solution).

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