area preserving mapping 保面积映射
orientation preserving mapping [数] 保持定向映射
order-preserving mapping [数] 保序映射
connection preserving mapping [数] 联络保存映射
length-preserving mapping 等距映射
scale preserving mapping [数] 保标度映射
sense-preserving mapping [数] 保向映射
We have studied the KS entropy of a 2-dimensional measure-preserving mapping with an elliptic or hyperbolic fixed point respectively, as well as that of its 3-dimensional extension.
我们已经研究了分别具椭圆和双曲不动点的二维保测度映射及其受摄三维扩张的KS熵。
In the paper researches on a three-dimensional measure-Preserving mapping system are made, which is the three-dimensional extension of the Keplerian map-ping.
本文通过构造形式级数的方式，给出了一种三维保测度映射系统中一维不变流形和二维不变流形的计算方法。
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