大家在查： Riemannian space Rif Mountains Rift valley fever right angle prism right atrioventricular orifice Riemannian manifold Riemann Sum Riemann mapping theorem Ridley Scott Rideau Canal

Riemannian metric

Riemannian metric

...vature tensor）提供了一项方法由给定的黎曼度规(Riemannian metric)所决定的几何究竟偏离寻常欧几里得 n- 空间多少的量度。