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arXiv 1807.00873math-phmath.MP
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热力学外延概念的几何探讨

A Geometric Approach to the Concept of Extensivity in Thermodynamics

Miguel Ángel García-Ariza

摘要:

本文从几何观点出发,对平衡态热力学中的外延度概念作了严格的处理。这是通过赋予一个系统的平衡态的流形一个光滑的图集,是兼容的伪群的向量空间上的变换,保持径向向量场。由此产生的几何结构允许广泛的微分形式和缩放的准确定义,和众所周知的两者之间的关系被复制。这种结构是由一个全局向量场表示的,该全局向量场被局部地写为径向向量场。横截于它的子流形是嵌入的,并且由延拓函数局部定义。

英文摘要:

This paper presents a rigorous treatment of the concept of extensivity in equilibrium thermodynamics from a geometric point of view. This is achieved by endowing the manifold of equilibrium states of a system with a smooth atlas that is compatible with the pseudogroup of transformations on a vector space that preserve the radial vector field. The resulting geometric structure allows for accurate definitions of extensive differential forms and scaling, and the well-known relationship between both is reproduced. This structure is represented by a global vector field that is locally written as a radial one. The submanifolds that are transversal to it are embedded, and locally defined by extensive functions.

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。

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