In this paper, we will introduce a novel argument (the “Region Argument”) that objects do not have frame‐independent shapes in special relativity. The Region Argument lacks vulnerabilities present in David Chalmers' argument for that conclusion based on length contraction. We then examine how views on persistence interact with the Region Argument. We argue that this argument and standard four‐dimensionalist assumptions entail that nothing in a relativistic world has any shape, not even stages or the regions occupied by them. We also argue that endurantists have viable ways of preserving shape despite the Region Argument. The upshot of these arguments is that contrary to conventional wisdom, considerations about shape in relativity support endurantism rather than four‐dimensionalism. We conclude by examining the implications of our discussion for the debate over Edenic shapes, noting that endurantists have a satisfying response to skeptical arguments about Edenic shapes similar to the one they have against the Region Argument.

中文翻译：

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恢复体形：持久性、形状和相对性


在本文中，我们将介绍一个新颖的论点（“区域论点”），即狭义相对论中物体不具有与框架无关的形状。区域论证缺乏大卫·查默斯基于长度收缩得出的结论的论证中存在的漏洞。然后我们研究持久性观点如何与区域论证相互作用。我们认为，这一论点和标准的四维主义假设意味着，相对论世界中的任何事物都没有任何形状，甚至阶段或它们所占据的区域也没有。我们还认为，尽管有地区争论，耐力主义者仍然有保持形状的可行方法。这些论点的结果是，与传统观点相反，相对论中关于形状的考虑支持持久论而不是四维论。最后，我们检查了我们的讨论对伊甸园形状辩论的影响，指出持久论者对伊甸园形状的怀疑论点有着令人满意的回应，类似于他们反对区域论点的论点。