Estimating leverage scores via rank revealing methods and randomization

1 code implementation • 23 May 2021 • Aleksandros Sobczyk, Efstratios Gallopoulos

We study algorithms for estimating the statistical leverage scores of rectangular dense or sparse matrices of arbitrary rank.

Dimensionality Reduction

EigenRec: Generalizing PureSVD for Effective and Efficient Top-N Recommendations

1 code implementation • 19 Nov 2015 • Athanasios N. Nikolakopoulos, Vassilis Kalantzis, Efstratios Gallopoulos, John D. Garofalakis

We introduce EigenRec; a versatile and efficient Latent-Factor framework for Top-N Recommendations that includes the well-known PureSVD algorithm as a special case.