过去视界

本书暂定概念：尚未进入正式概念库。下面是本书给出的定义原文。

定义 · 6.1 施瓦西解

这说明视界并不是一个零曲面，而是两个零曲面，它们相交于点$U=V=0$。这与我们从近视界极限（在那里我们遇到了 Rindler 空间）中得到的结果一致。零曲面 U = 0 是黑洞的视界，称为未来视界(future horizon)；零曲面 V = 0 是白洞的视界，即过去视界(past horizon)。

英文原文

This tells us that the horizon is not one null surface, but two null surfaces, intersecting at the point $U=V=0$ . This agrees with what we learned from taking the near horizon limit where we encountered Rindler space. The null surface U = 0 is the horizon of the black hole; it is called the future horizon. The null surface V = 0 is the horizon of the white hole; it is the past horizon.

出处：6.1 施瓦西解 · node a-993e64c08c3754f64d88d551 · 源节点 SHA-256 9c2f143216da5041…