Computer Science – Learning
Scientific paper
2009-06-11
Computer Science
Learning
22 pages, 3 figures
Scientific paper
Given a matrix M of low-rank, we consider the problem of reconstructing it from noisy observations of a small, random subset of its entries. The problem arises in a variety of applications, from collaborative filtering (the `Netflix problem') to structure-from-motion and positioning. We study a low complexity algorithm introduced by Keshavan et al.(2009), based on a combination of spectral techniques and manifold optimization, that we call here OptSpace. We prove performance guarantees that are order-optimal in a number of circumstances.
Keshavan Raghunandan H.
Montanari Andrea
Oh Sewoong
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