Author information
Authors and Affiliations
Additional information
Received 7 March 1995; in final form 28 September 1995
Rights and permissions
About this article
Cite this article
Xu, J., You, J. & Qiu, Q. Invariant tori for nearly integrable Hamiltonian systems with degeneracy. Math Z 226, 375–387 (1997). https://doi.org/10.1007/PL00004344
Issue Date:
DOI: https://doi.org/10.1007/PL00004344