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arXiv 1806.11409nlin.CD
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具有非球基元的圆形Sitnikov四体问题的收敛域

Basins of convergence in the circular Sitnikov four-body problem with non-spherical primaries

Euaggelos E. Zotos, Satyendra Kumar Satya, Rajiv Aggarwal, Md Sanam Suraj

摘要:

数值研究了具有非球基元的Sitnikov四体问题中与平衡点有关的Newton-Raphson收敛域。我们监测的根的位置的参数演变,作为扁率系数的函数。采用经典的Newton-Raphson最优化方法,通过对几种类型的二维平面上初始条件的稠密网格进行分类,来揭示收敛域。我们进行了系统和深入的分析,试图了解扁率系数如何影响的几何形状以及收敛区域的盆地熵。收敛区域与所需的迭代次数以及相应的概率分布有关。

英文摘要:

The Newton-Raphson basins of convergence, related to the equilibrium points, in the Sitnikov four-body problem with non-spherical primaries are numerically investigated. We monitor the parametric evolution of the positions of the roots, as a function of the oblateness coefficient. The classical Newton-Raphson optimal method is used for revealing the basins of convergence, by classifying dense grids of initial conditions in several types of two-dimensional planes. We perform a systematic and thorough analysis in an attempt to understand how the oblateness coefficient affects the geometry as well as the basin entropy of the convergence regions. The convergence areas are related with the required number of iterations and also with the corresponding probability distributions.

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