\^^M{ \frametitle{Conclusion} Some machine learning applications involve an $M \times N$ array $A$ of data, were $N$ counts the number of data instances, and $M$ measures the size of each data item. \vskip 0.1in The array $A$ can be exactly represented by the full SVD, $A = U * D * V'$ \vskip 0.1in Often, the data items have a great deal of similarity and correlation. Then the entries of the $D$ matrix will vary greatly in size. \vskip 0.1in Then the information in $A$ can be well approximated by a low rank approximation using only the first $K$ columns of the SVD factors. }