标题： 爱因斯坦-斯特劳斯模型在圆柱对称情形下的推广 显示英文标题

标题： Generalisations of the Einstein-Straus model to cylindrically symmetric settings

摘要： 我们研究在圆柱对称情形下的爱因斯坦-斯特劳斯模型的推广，通过考虑静态时空与非静态空间齐次时空的匹配，保持对称性。 我们发现这样的模型存在严重的限制，例如在非静态部分的一个度规系数必须为常数。 这一结果意味着无法将静态的局部圆柱对称物体嵌入合理的空间齐次宇宙学中。 显示英文摘要

摘要： We study generalisations of the Einstein--Straus model in cylindrically symmetric settings by considering the matching of a static space-time to a non-static spatially homogeneous space-time, preserving the symmetry. We find that such models possess severe restrictions, such as constancy of one of the metric coefficients in the non-static part. A consequence of this is that it is impossible to embed static locally cylindrically symmetric objects in reasonable spatially homogeneous cosmologies.