双扭向量与双扭时空和Kundt时空的分类
Doubly Torqued Vectors and a classification of Doubly Twisted and Kundt spacetimes
摘要：
双扭矢量的简单结构允许双扭曲到弯曲时空的自然特征，以及到PP波的孔特时空。对于第一个向量是类时的，对于其他向量是零的。我们还讨论了一些性质，以及它们与超曲面正交共形Killing向量和零Killing向量的关系。
英文摘要：
The simple structure of doubly torqued vectors allows for a natural characterization of doubly twisted down to warped spacetimes, as well as Kundt spacetimes down to PP waves. For the first ones the vectors are timelike, for the others they are null. We also discuss some properties, and their connection to hypersurface orthogonal conformal Killing vectors, and null Killing vectors.
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。
