I am major in qualtitive thoery of ODE and intrested in normal forms espectially.
Publications
1. Wu, Hao; Li, Weigu. Extension of Floquet's theory to nonlinear quasiperiodic differential equations. Sci. China Ser. A 48 (2005), no. 12, 1670–1682.
2. Liu, Changjian; Wu, Hao; Yang, Jiazhong. The Kowalevskaya exponents and rational integrability of polynomial differential systems. Bull. Sci. Math. 130 (2006), no. 3, 234–245.
3. Llibre, Jaume; Wu, Hao. Hopf bifurcation for degenerate singular points of multiplicity 2n−1 in dimension 3. Bull. Sci. Math. 132 (2008), no. 3, 218–231.
4. Wang, Ping; Wu, Hao; Li, Wei Gu. Normal forms for periodic orbits of real vector fields. Acta Math. Sin. (Engl. Ser.) 24 (2008), no. 5, 797–808.
5. Wu, Hao; Li, Weigu. Poincaré type theorems for non-autonomous systems. J. Differential Equations 245 (2008), no. 10, 2958–2978.
6. Llibre, Jaume; Wu, Hao; Yu, Jiang. Linear estimate for the number of limit cycles of a perturbed cubic polynomial differential system. Nonlinear Anal. 70 (2009), no. 1, 419–432.
7. Li, Weigu; Llibre, Jaume; Wu, Hao. Normal forms for almost periodic differential systems. Ergodic Theory Dynam. Systems 29 (2009), no. 2, 637–656.
8. Li, Weigu; Llibre, Jaume; Wu, Hao. Polynomial and linearized normal forms for almost periodic difference systems. J. Difference Equ. Appl. 15 (2009), no. 10, 927–948.
9. Wu, Hao; Li, Weigu. Isochronous properties in fractal analysis of some planar vector fields. Bull. Sci. Math. 134 (2010), no. 8, 857–873.
10. Jiao, Lei; Li, Ming; Wu, Hao. General laws of the analytic linearization for random diffeomorphisms. Math. Z. 270 (2012), no. 3-4, 739–757.
11. Li, Weigu; Llibre, Jaume; Wu, Hao. Reduction of periodic difference systems to linear or autonomous ones. Bull. Sci. Math. 137 (2013), no. 2, 129–139.
12. Wu, Hao Uniform methods to establish Poincaré type linearization theorems. Publ. Mat. 58 (2014), suppl., 497–527.
13. Li, Weigu; Llibre, Jaume; Wu, Hao Polynomial and linearized normal forms for almost periodic differential systems. Discrete Contin. Dyn. Syst. 36 (2016), no. 1, 345–360.
14. Wu, Hao. Gevrey smooth topology is proper to detect normalization under Siegel type small divisor conditions. Math. Z. 284 (2016), 1223–1243.
15. Zhang, Dongfeng; Xu, Junxiang; Wu, Hao On Invariant Tori with Prescribed Frequency in Hamiltonian Systems. Advanced Nonlinear Studies16 (2016), 1536-1365.