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arXiv math-ph/0505024math-phmath.MP
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非线性二阶Riccati系统的Lagrange形式:一维可积性和二维超可积性

Lagrangian Formalism for nonlinear second-order Riccati Systems: one-dimensional Integrability and two-dimensional Superintegrability

José F. Cariñena, Manuel F. Rañada, Mariano Santander

摘要:

分析了二阶Riccati方程的Lagrange描述的存在性,并将所得结果应用于与广义Riccati方程相关的两个不同非线性系统的研究.拉格朗日量是非自然的,力不能从势中导出。守恒能量函数的常数值$E$可用作表征这两个系统解的行为的适当参数。第二部分证明了具有超可积性的二维形式的存在性。在这两种情况下,得到了附加积分的显式表达式。最后证明了第二类系统的轨道可以看作是非线性李萨如图

英文摘要:

The existence of a Lagrangian description for the second-order Riccati equation is analyzed and the results are applied to the study of two different nonlinear systems both related with the generalized Riccati equation. The Lagrangians are nonnatural and the forces are not derivable from a potential. The constant value $E$ of a preserved energy function can be used as an appropriate parameter for characterizing the behaviour of the solutions of these two systems. In the second part the existence of two--dimensional versions endowed with superintegrability is proved. The explicit expressions of the additional integrals are obtained in both cases. Finally it is proved that the orbits of the second system, that represents a nonlinear oscillator, can be considered as nonlinear Lissajous figures

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