论文标题
与有效双曲线双重特征相关的时间功能的注释
A note on time functions associated with effectively hyperbolic double characteristics
论文作者
论文摘要
假设特征根仅在一侧$ t \ geq 0 $上是真实的，则讨论了有效的双曲线奇异点的几何方面。特别是，与双方的特征根都是真实的情况，$ t \ geq 0 $和$ t <0 $。
Geometrical aspects of effectively hyperbolic singular points over $t=0$ are discussed assuming that the characteristic roots are real only on the one side $t\geq 0$. In particular, the difference from the case that the characteristic roots are real in both sides $t\geq 0$ and $t<0$.
