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arXiv 2302.02620math-phmath.MP
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BGPP度量的测地流是刘维尔可积的

The geodesic flow of the BGPP metric is Liouville integrable

Andrzej J. Maciejewski, Maria Przybylska, Galliano Valent

AI总结:

该研究证明BGPP度量的测地流具有刘维尔可积性,利用$\text{SO}(3,\text{R})$对称性将四自由度系统约化为两自由度,其解可显式求解或转化为求积,退化情形下的求积可通过椭圆积分显式计算。

摘要:

我们证明了对应于BGPP度量的测地方程在刘维尔意义下是可积的。该模型的$\text{SO}(3,\text{R})$对称性可将系统的自由度从四个约化到两个。此外,约化系统及其退化情形的解可以显式求解,或被约化为某种求积形式。在退化情形下,BGPP度量与Eguchi-Hanson度量一致,此时上述求积可通过椭圆积分显式计算。

英文摘要:

We prove that the geodesics equations corresponding to the BGPP metric are integrable in the Liouville sense. The $\mathrm{SO}(3,\mathbb{R})$ symmetry of the model allows to reduce the system from four to two degrees of freedom. Moreover, solutions of the reduced system and its degenerations can be solved explicitly or reduced to a certain quadrature. In degenerated cases BGPP metric coincides with the Eguchi-Hanson metric and for this case the mentioned quadrature can be calculated explicitly in terms of elliptic integrals.

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