Funder
the Natural Science Foundation of the Jiangsu Higher Education Institutions of China
China Postdoctoral Science Foundation
the PhD research startup foundation of Jinling Institute Technology
Publisher
Springer Science and Business Media LLC
Reference21 articles.
1. Bruno, A.D.: Analytic form of differential equations. Trans. Moscow Math. Soc. 25, 131–288 (1971)
2. Bruno, A.D.: Analytic form of differential equations. Trans. Moscow Math. Soc. 26, 199–239 (1972)
3. Deimling, K.: Nonlinear Functional Analysis. Springer, Berlin (1985)
4. García, C.B., Li, T.Y.: On the number of solutions to polynomial systems of equations. SIAM J. Numer. Anal. 17, 540–546 (1980)
5. Hu, S.-Q., Liu, B.: Completely degenerate lower-dimensional invariant tori for Hamiltonian system. J. Differ. Equ. 266(11), 7459–7480 (2019)