A Two-Level Block Preconditioned Jacobi-Davidson Method for Computing Multiple and Clustered Eigenvalues. - Qigang Liang; Wei Wang 338; Xuejun Xu (CoRR, 2022)

A Weak Galerkin Finite Element Method Can Compute Both Upper and Lower Eigenvalue Bounds. - Qigang Liang; Xuejun Xu; Liuyao Yuan (J. Sci. Comput., 2022)

A two-level preconditioned Helmholtz-Jacobi-Davidson method for the Maxwell eigenvalue problem. - Qigang Liang; Xuejun Xu (Math. Comput., 2022)

On a Sharp Estimate of Overlapping Schwarz Methods in H(curl;Ω) and H(div;Ω). - Qigang Liang; Xuejun Xu; Shangyou Zhang (CoRR, 2023)

A Two-Level Preconditioned Helmholtz Subspace Iterative Method for Maxwell Eigenvalue Problems. - Qigang Liang; Xuejun Xu (SIAM J. Numer. Anal., 2023)

A Two-Level Block Preconditioned Jacobi-Davidson Method for Multiple and Clustered Eigenvalues of Elliptic Operators. - Qigang Liang; Wei Wang 338; Xuejun Xu (SIAM J. Numer. Anal., 2024)

Computing Both Upper and Lower Eigenvalue Bounds by HDG Methods. - Qigang Liang; Xuejun Xu; Liuyao Yuan (Comput. Methods Appl. Math., 2025)