非线性分析，非线性迭代方法，非线性优化，金融数学

1.convergence theorems for strict pseudo-contractions in Hilbert Spaces, Journal of Mathematical Analysis and Applications, 329 (2007),336-346.
2.G. Lopez Acedo and H.K. Xu, Iterative methods for strict pseudo-contractions in Hilbert spaces, Nonlinear Analysis, 67 (2007), 2258-2271.
3.T.H. Kim and H.K. Xu (2007a), Robustness of Mann's algorithm for nonexpansive mappings, Journal of Mathematical Analysis and Applications, 327 (2007), 1105-1115.
4.L.C. Ceng and H.K. Xu, Strong convergence of a hybrid viscosity approximation method with perturbed mappings for nonexpansive and accretive operators, Taiwanese Journal of Mathematics, 11 (2007), no. 3, 661-682.
5.T.H. Kim and H.K. Xu,Convergence of the modified Mann's iteration method for asymptotically strict pseudo-contractions.Nonlinear Analysis, Theory, Methods, and Applications, 68(2008),2828-2836.