物理学中的瞬变-点力学和广义相对论
Instants in physics - point mechanics and general relativity
摘要：
物理学理论通常不涉及“现在”或“现在”。然而，它们通常有一个精确的“瞬间”（或状态）概念。我回顾这个概念如何出现在关系点力学和它如何足以确定持续时间-一个事实，往往被忽视的现代演示的分析动力学。对广义相对论也进行了类似的讨论。最后，我批判性地评论了点力学和场论中的关系论之间的区别，以及场和时空之间有问题的基础依赖性。
英文摘要：
Theories in physics usually do not address ``the present''or ``the now''. However, they usually have a precise notion of an ``instant'' (or state). I review how this notion appears in relational point mechanics and how it suffices to determine durations - a fact that is often ignored in modern presentations of analytical dynamics. An analogous discussion is attempted for General Relativity. Finally I critically remark on the difference between relationalism in point mechanics and field theory and the problematic foundational dependencies between fields and spacetime.
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。
