2 papers
math.OC2025
Exact Solutions for the NP-hard Wasserstein Barycenter Problem using a Doubly Nonnegative Relaxation and a Splitting Method
Woosuk L. Jung, Henry Wolkowicz
The so-called \emph{simplified} Wasserstein barycenter problem, also known as the cheapest hub problem, consists in selecting one point from each of given sets, each set consis…
math.NA2024
The -Condition Number: Applications to Optimal Preconditioning and Low Rank Generalized Jacobian Updating
Woosuk L. Jung, David Torregrosa-Belén, Henry Wolkowicz
Preconditioning is essential in iterative methods for solving linear systems. It is also the implicit objective in updating approximations of Jacobians in optimization methods, e.g…