First integral and integral invariant of Birkhoffian system

• 作 者: MEI Fengxiang WU Huibin
• 机 构: College of Science and Technology
• 出 处: 科学通报（英文版）
• 发表日期: 2004年期
• 关键词: analytical mechanics Birkhoffian system first integral integral invariant
• 基金项目: the Doctoral Program Foundation of Institution of Higher Education of China

The variational equation of the Birkhoffian system is established,by which it is proved that an integral invariant can be constructed with a known first integral.And its inverse is also correct.