[1] Liang, Qigang; Xie, Hehu; Xu, Xuejun An augmented subspace method for computing interior multiple and clustered eigenvalues of symmetric elliptic operators. To appear in IMA J. Numer. Anal., 2026.
[2] Li, Zhenglei; Liang, Qigang; Xu, Xuejun Pointwise a posteriori error estimators for multiple and clustered eigenvalue computations. To appear in J. Sci. Comput., 2026.
[3] Li, Zhenglei; Liang, Qigang; Xu, Xuejun Pointwise a posteriori error estimators for elliptic eigenvalue problems. J. Intell. Algorithms Sci. Comput., 1(1):111–132, 2026. (Special Issue)
[4] Liang, Qigang; Xu, Xuejun; Yuan, Liuyao Computing both upper and lower eigenvalue bounds by HDG methods. Comput. Methods Appl. Math. 25 (2025), no. 3, 643–663. (Special Issue)
[5] Liang, Qigang; Xu, Xuejun; Zhang, Shangyou On a sharp estimate of overlapping Schwarz methods in H(curl; Ω) and H(div; Ω). IMA J. Numer. Anal. 45 (2025), no. 2, 1009–1027.
[6] Liang, Qigang; Wang, Wei; Xu, Xuejun A domain decomposition method for nonconforming finite element approximations of eigenvalue problems. Commun. Appl. Math. Comput. 7 (2025), no. 2, 606–636. (Special Issue)
[7] Liang, Qigang; Wang, Wei; Xu, Xuejun A two-level block preconditioned Jacobi-Davidson method for multiple and clustered eigenvalues of elliptic operators. SIAM J. Numer. Anal. 62 (2024), no. 2, 998–1019.
[8] Liang, Qigang; Xu, Xuejun A two-level preconditioned Helmholtz subspace iterative method for Maxwell eigenvalue problems. SIAM J. Numer. Anal. 61 (2023), no. 2, 642–674.
[9] Liang, Qigang; Xu, Xuejun; Yuan, Liuyao A weak Galerkin finite element method can compute both upper and lower eigenvalue bounds. J. Sci. Comput. 93 (2022), no. 1, Paper No. 19, 21 pp.
[10] Liang, Qigang; Xu, Xuejun A two-level preconditioned Helmholtz-Jacobi- Davidson method for the Maxwell eigenvalue problem. Math. Comp. 91 (2022), no. 334, 623–657.