Approximation Algorithms for $\ell_0$-Low Rank Approximation

neural information processing systems, pp. 6648-6659, 2017.

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We study the $ell_0$-Low Rank Approximation Problem, where the goal is, given an $m times n$ matrix $A$, to output a rank-$k$ matrix $Au0027$ for which $|Au0027-A|_0$ is minimized. Here, for a matrix $B$, $|B|_0$ denotes the number of its non-zero entries. This NP-hard variant of low rank approximation is natural for problems with no unde...More



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