This paper mainly USES the descent of the maps to give a periodic orbit of class continuous map of the square.
本文主要利用映射的下降给出一类二维自映射的周期轨道。
This kind of periodic orbit is only a phase in a comet's life.
这种周期性轨道只是彗星生命中的一个阶段。
Using the periodic orbit theory, we computed the quantum level density of a particle in the two-dimensional harmonic oscillator potential with and without the magnetic flux line for different cases.
利用周期轨道理论，我们计算了在不同情况下，一个粒子在二维谐振子势中存在和不存在磁通量时的量子能级密度。
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