- Geodesic - from Wolfram MathWorld
A geodesic is a locally length-minimizing curve Equivalently, it is a path that a particle which is not accelerating would follow In the plane, the geodesics are straight lines On the sphere, the geodesics are great circles (like the equator) The geodesics in a space depend on the Riemannian metric, which affects the notions of distance and acceleration Geodesics preserve a direction on a
- 什么是测地线（geodesic）？【讲解清晰生动，深入浅出，通俗易懂】-CSDN博客
2 N the shortest line between two points on a curved or plane surface 短程线 (Also called geodesic line) The existence of the infinite closed geodesics of a compact no- simply connected Riemannian manifold 紧致的非单连通黎曼流形上无穷多的闭测地线存在性问题？
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