3 papers
math.NA2026
On subspace-constrained preconditioning for randomized iterative methods
Yonghan Sun, Hou-Duo Qi, Deren Han +1
In this paper, we further investigate and refine the subspace-constrained preconditioning technique to enhance the theoretical and numerical convergence properties of randomized it…
math.NA2026
Linear convergence of Gearhart-Koshy accelerated Kaczmarz methods for tensor linear systems
Yijie Wang, Yonghan Sun, Deren Han +1
The generalized Gearhart-Koshy acceleration is a recent exact affine search technique designed for the method of cyclic projections onto hyperplanes, i.e., the Kaczmarz method. How…
math-ph2025
Approximating Quantum States with Positive Partial Transposes in Multipartite System via Linearized Proximal Alternative Direction Method of Multipliers
Jingwen Fan, Deren Han, Lin Chen
Numerical approximation of quantum states via convex combinations of states with positive partial transposes (bi-PPT state) in multipartite systems constitutes a fundamental challe…