Zhongruo Wang

A Manifold Proximal Linear Method for Sparse Spectral Clustering with Application to Single-Cell RNA Sequencing Data Analysis

  • Shixiang Chen
  • Shiqian Ma
  • Bingyuan Liu
  • Zhongruo Wang
  • Lingzhou Xue
  • Hongyu Zhao
    • Categories Nonlinear Optimization

    Spectral clustering is one of the fundamental unsupervised learning methods widely used in data analysis. Sparse spectral clustering (SSC) imposes sparsity to the spectral clustering and it improves the interpretability of the model. This paper considers a widely adopted model for SSC, which can be formulated as an optimization problem over the Stiefel manifold with … Read more

    Zeroth-Order Algorithms for Nonconvex Minimax Problems with Improved Complexities

  • Krishnakumar Balasubramanian
  • Shiqian Ma
  • Meisam Razaviyayn
  • Zhongruo Wang
    • Categories Nonlinear Optimization

    In this paper, we study zeroth-order algorithms for minimax optimization problems that are nonconvex in one variable and strongly-concave in the other variable. Such minimax optimization problems have attracted significant attention lately due to their applications in modern machine learning tasks. We first design and analyze the Zeroth-Order Gradient Descent Ascent (ZO-GDA) algorithm, and provide … Read more