2 papers
cs.DS2025
Ridge Leverage Score Sampling for Subspace Approximation
David P. Woodruff, Taisuke Yasuda
The subspace approximation problem is an NP-hard low rank approximation problem that generalizes the median hyperplane (), principal component analysis (), a…
cs.DS2025
John Ellipsoids via Lazy Updates
David P. Woodruff, Taisuke Yasuda
We give a faster algorithm for computing an approximate John ellipsoid around points in dimensions. The best known prior algorithms are based on repeatedly computing the le…