INFORMATION RETRIEVAL USING SPARSE MATRIX SKETCHING
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United States of America Patent
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app pub date -
Mar 13, 2013
filing date -
Mar 13, 2013
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Abstract
Embodiments of the invention include method of approximating a matrix of data using sparse matrices which includes receiving a first matrix and generating a second matrix based on the first matrix and a first sparse matrix. The method further includes generating a third matrix based on the first matrix and a second sparse matrix and generating a fourth matrix by generating a Moore-Penrose pseudo-inverse matrix based on the first matrix, the second matrix and the third matrix. The method also includes generating a fifth matrix based on a product of the second matrix, the third matrix, and a fourth matrix. The method further includes receiving, by a computer, a request to access at least one entry of the first matrix and responding to the request by accessing an entry of the fifth matrix.
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