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stat.ML2012★ 269 cited
Fast and Robust Recursive Algorithms for Separable Nonnegative Matrix Factorization
Nicolas Gillis, Stephen A. Vavasis
In this paper, we study the nonnegative matrix factorization problem under the separability assumption (that is, there exists a cone spanned by a small subset of the columns of the…
math.OC2012★ 1 cited
Detecting and correcting the loss of independence in nonlinear conjugate gradient
Sahar Karimi, Stephen Vavasis
It is well known that search directions in nonlinear conjugate gradient (CG) can sometimes become nearly dependent, causing a dramatic slow-down in the convergence rate. We provide…