Search Results for author: Yongchun Li

Found 4 papers, 2 papers with code

On the Partial Convexification for Low-Rank Spectral Optimization: Rank Bounds and Algorithms

no code implementations12 May 2023 Yongchun Li, Weijun Xie

A Low-rank Spectral Optimization Problem (LSOP) minimizes a linear objective subject to multiple two-sided linear matrix inequalities intersected with a low-rank and spectral constrained domain set.

On the Exactness of Dantzig-Wolfe Relaxation for Rank Constrained Optimization Problems

no code implementations28 Oct 2022 Yongchun Li, Weijun Xie

These conditions can be very useful to identify new results, including the extreme point exactness for a QCQP problem that admits an inhomogeneous objective function with two homogeneous two-sided quadratic constraints and the convex hull exactness for fair SVD.

Exact and Approximation Algorithms for Sparse PCA

1 code implementation28 Aug 2020 Yongchun Li, Weijun Xie

Sparse PCA (SPCA) is a fundamental model in machine learning and data analytics, which has witnessed a variety of application areas such as finance, manufacturing, biology, healthcare.

Dimensionality Reduction feature selection

Best Principal Submatrix Selection for the Maximum Entropy Sampling Problem: Scalable Algorithms and Performance Guarantees

1 code implementation23 Jan 2020 Yongchun Li, Weijun Xie

By developing new mathematical tools for the singular matrices and analyzing the Lagrangian dual of the proposed convex integer program, we investigate the widely-used local search algorithm and prove its first-known approximation bound for MESP.

Cannot find the paper you are looking for? You can Submit a new open access paper.