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几何 >> 微分几何 >> 曲线曲面论
Questions in category: 曲线曲面论 (Curve and surface theory).

求下列曲线的曲率和挠率.

Posted by haifeng on 2012-06-30 09:46:40 last update 2012-07-26 09:21:48 | Answers (2) | 收藏

  1. $\vec{r}=e^t(\sin t,\cos t,1)$,
  2. $\vec{r}=a(\cosh t,\sinh t,t)$.