摘要
研究了一类参数方程的曲线,其参变量表示为所谓时标(time scale),该时标是所有实数的集的一个任意闭子集.引入了相应于矢量场的方向导数.
The general idea is to study curves where in the parametric equations the parameter varies in a so-called time scale, which may be an arbitrary dosed subset of the set of all real numbers. The directional derivative according to the vector fields was introduced.
出处
《应用数学和力学》
CSCD
北大核心
2006年第10期1182-1192,共11页
Applied Mathematics and Mechanics
