1) Spacelike congruence
类空线汇
2) time-like congruence
类时线汇
1.
In this paper, we study some properties about rectilinear congruences, especially about time-like congruences in a Minkowski 3-space.
本文研究了三维Minkowski空间中直线汇的一些性质,特别是关于类时线汇的性质。
3) class of a congruence
线汇的类
4) lightlike rectilinear congruence
类光线汇
1.
According to the type of light, we can divide rectilinear congruence into three types: timelike rectilinear congruence, spacelike rectilinear congruence and lightlike rectilinear congruence.
根据线汇中光线的类型,将线汇分成类时线汇、类空线汇和类光线汇三种。
5) spacelike curve
类空曲线
1.
In this paper,we defined the notions of lightcone Gauss map and lightcone height function of a spacelike curve in Minkowski 4-space,and established the relationships between singularities of these objects and geometric invariants of curves under the action Lorentz group.
定义了四维M inkow sk i空间内类空曲线的光锥高斯映射、光锥高度函数的概念,建立了这些对象的奇点与在洛仑兹群作用下曲线的几何不变量之间的关系。
2.
In this paper as an applications of unfolding of functions by one-variable theory rudimentary classified singularities of a spacelike curve in Minkowski 4-space.
利用单变量函数的开折理论对R14空间内类空曲线的奇点进行了初步分类。
6) typology on lexical curve
词汇曲线类型
补充资料：汇类
1.谓汇总其类。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条