Structural Conditions for Projection-Cost Preservation via Randomized Matrix Multiplication

29 May 2017  ·  Agniva Chowdhury, Jiasen Yang, Petros Drineas ·

Projection-cost preservation is a low-rank approximation guarantee which ensures that the cost of any rank-$k$ projection can be preserved using a smaller sketch of the original data matrix. We present a general structural result outlining four sufficient conditions to achieve projection-cost preservation. These conditions can be satisfied using tools from the Randomized Linear Algebra literature.

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