中国物理B ›› 2010, Vol. 19 ›› Issue (12): 124601-124601.doi: 10.1088/1674-1056/19/12/124601

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Symmetry and conserved quantities of discrete generalized Birkhoffian system

张克军, 方建会, 李燕   

  1. College of Physics Science and Technology, China University of Petroleum, Dongying 257061, China
  • 收稿日期:2010-03-30 修回日期:2010-06-02 出版日期:2010-12-15 发布日期:2010-12-15
  • 基金资助:
    Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 09CX04018A).

Symmetry and conserved quantities of discrete generalized Birkhoffian system

Zhang Ke-Jun(张克军), Fang Jian-Hui(方建会), and Li Yan(李燕)   

  1. College of Physics Science and Technology, China University of Petroleum, Dongying 257061, China
  • Received:2010-03-30 Revised:2010-06-02 Online:2010-12-15 Published:2010-12-15
  • Supported by:
    Project supported by the Fundamental Research Funds for the Central Universities of China (Grant No. 09CX04018A).

摘要: The Noether symmetry, the Mei symmetry and the conserved quantities of discrete generalized Birkhoffian system are studied in this paper. Using the difference discrete variational approach, the difference discrete variational principle of discrete generalized Birkhoffian system is derived. The discrete equations of motion of the system are established. The criterion of Noether symmetry and Mei symmetry of the system is given. The discrete Noether and Mei conserved quantities and the conditions for their existence are obtained. Finally, an example is given to show the applications of the results.

Abstract: The Noether symmetry, the Mei symmetry and the conserved quantities of discrete generalized Birkhoffian system are studied in this paper. Using the difference discrete variational approach, the difference discrete variational principle of discrete generalized Birkhoffian system is derived. The discrete equations of motion of the system are established. The criterion of Noether symmetry and Mei symmetry of the system is given. The discrete Noether and Mei conserved quantities and the conditions for their existence are obtained. Finally, an example is given to show the applications of the results.

Key words: discrete generalized Birkhoffian system, Noether symmetry, Mei symmetry, conserved quantity

中图分类号:  (Variational and optimizational methods)

  • 46.15.Cc