镶嵌宇宙暗物质片：宇宙中的折纸折痕和找到它们的方法
Tessellating the cosmological dark-matter sheet: origami creases in the universe and ways to find them
摘要：
在宇宙大尺度结构的研究中，镶嵌在概念上和分析上都很有价值。它们为“宇宙网”提供了一个概念模型，并且对分析宇宙学数据非常有用。在这里，我们描述了另一组坐标系中的镶嵌，最初是由暗物质组成的平面，重力将其折叠起来，大致类似于折纸。这种褶皱的发展被称为焦散，它们将空间镶嵌成溪流区域。对暗物质层的镶嵌在模拟分析中也很有用，例如用于密度测量，以及识别流重叠的结构。
英文摘要：
Tessellations are valuable both conceptually and for analysis in the study of the large-scale structure of the universe. They provide a conceptual model for the 'cosmic web,' and are of great use to analyze cosmological data. Here we describe tessellations in another set of coordinates, of the initially flat sheet of dark matter that gravity folds up in rough analogy to origami. The folds that develop are called caustics, and they tessellate space into stream regions. Tessellations of the dark-matter sheet are also useful in simulation analysis, for instance for density measurement, and to identify structures where streams overlap.
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。
