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Ky Vu(vukhackygmail.com) Abstract: Random projections are random linear maps, sampled from appropriate distributions, that approximately preserve certain geometrical invariants so that the approximation improves as the dimension of the space grows. The wellknown JohnsonLindenstrauss lemma states that there are \LL{random matrices with surprisingly few rows} that approximately preserve pairwise Euclidean distances among a set of points. This is commonly used to speed up algorithms based on Euclidean distances. We prove that these matrices also preserve other quantities, such as the distance to a cone. We exploit this result to devise a probabilistic algorithm to solve linear programs approximately. We show that this algorithm can approximately solve very large randomly generated LP instances. We also showcase its application to an error correction coding problem. Keywords: JohnsonLindenstrauss lemma, concentration of measure, dimension reduction Category 1: Linear, Cone and Semidefinite Programming (Linear Programming ) Citation: Download: [PDF] Entry Submitted: 06/08/2017 Modify/Update this entry  
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