关于有效双曲重特征线时间函数的注记
A note on time functions associated with effectively hyperbolic double characteristics
摘要：
假设特征根仅在$t\geq 0$的一侧为实数，讨论了$t=0$上有效双曲奇点的几何性质.具体地，与在两侧$t\geq 0$和$t<0$中特征根都是实数的情况的差异。
英文摘要：
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 $t<0$.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
