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data science

A brief history of the Singular value decomposition of matrices with some applications

The singular value decomposition (SVD) of a matrix is a fundamental result in linear algebra and its applications in data science.   
It produces good bases for the four fundamental subspaces associated with a real matrix A: the row and column spaces,  the nullspace, and the nullspace of its transpose of A.   The SVD produces a method to find the best approximation of A by matrices of lower rank.  This Theorem has applications to data compression.