Convex surfaces have two points {conjugate point} through which many geodesics have same distance, so geodesics are not unique. For example, Earth North Pole and South Pole have many equivalent geodesics (longitudes).
Physical Sciences>Physics>Relativity>General Relativity>Curvature>Geodesics
5-Physics-Relativity-General Relativity-Curvature-Geodesics
Outline of Knowledge Database Home Page
Description of Outline of Knowledge Database
Date Modified: 2022.0224