Abstract:Count-sketch is a popular matrix sketching algorithm that can produce a sketch of an input data matrix X in O(nnz(X)) time where nnz(X) denotes the number of non-zero entries in X. The sketched matrix will be much smaller than X while preserving most of its properties. Therefore, count-sketch is widely used for addressing high-dimensionality challenge in machine learning. However, there are two main limitations of count-sketch: (1) The sketching matrix used count-sketch is generated randomly which does not con… Show more
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