单参数子群
- 网络one-parameter subgroup
单参数子群-
定理2在双曲平面H~2上，运动群G的单参数子群的每个轨道或是一个点，或是一条常（测地）曲率曲线.其逆亦真。
Theorem 2 . Every orbit of the one-parameter subgroup of G is either a single point or a curve of constant ( geodesic ) curvature , and vice versa .
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双曲运动群的单参数子群及其轨道
On the One-parameter Subgroups of the Group of Hyperbolic Motions and Their Orbits