标题： 黑洞平衡问题是否已经解决？ 显示英文标题

标题： Has the black hole equilibrium problem been solved?

摘要： 当“黑洞”这一术语在1968年最初被提出时，人们立即推测，唯一的纯真空平衡状态是Kerr族的那些。 在1968年至1975年的“经典阶段”，证实这一猜想的努力取得了快速进展，近年来一些论证中的漏洞也得到了弥补。 然而，目前可用的证明仍然受到一些不希望有的限制性假设的影响，例如视界的非退化性，以及外部区域的解析性和因果性。 显示英文摘要

摘要： When the term ``black hole'' was originally coined in 1968, it was immediately conjectured that the only pure vacuum equilibrium states were those of the Kerr family. Efforts to confirm this made rapid progress during the ``classical phase'' from 1968 to 1975, and some gaps in the argument have been closed during more recent years. However the presently available demonstration is still subject to undesirably restrictive assumptions such as non-degeneracy of the horizon, as well as analyticity and causality in the exterior.