CountSketches, Feature Hashing and the Median of Three
Kasper Green Larsen 1 Rasmus Pagh 2 Jakub Tetek 2
Abstract multitask learning (Weinberger et al., 2009) — see sec-
tion 1.5 for more details.
In this paper, we revisit the classic CountSketch
method, which is a sparse, random projection that 1.1. Sketch description
transforms a (high-dimensional) Euclidean vec-
tor v to a vector of dimension ...


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