保守向量场和相交规则

Daniel A. Jaffa
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引用次数: 0

摘要

本文介绍了保守向量场的概念及其在矢量物理和牛顿力学中的应用。保守向量场被定义为标量值势函数的梯度。梯度场是不旋转的,根据克劳定理,所有保守向量场的旋度都是零。此外,保守向量场中的线积分是路径无关的,封闭路径上的线积分总是等于零,这一性质由多变量微积分的梯度定理证明。梯度场表示保守力,相关的势函数类似于与所述保守力相关的势能。相交规则通过将不定积分视为满足该积分的无穷多个函数的集合,为确定向量场是否保守和推导势函数提供了一种新的、独特的捷径。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Conservative Vector Fields and the Intersect Rule
This paper covers the concept of a conservative vector field, and its application in vector physics and Newtonian mechanics. Conservative vector fields are defined as the gradient of a scalar-valued potential function. Gradient fields are irrotational, as in the curl in all conservative vector fields is zero, by Clairaut’s Theorem. Additionally, line integrals in conservative vector fields are path-independent, and line integrals over closed paths are always equal to zero, properties proved by the Gradient Theorem of multivariable calculus. Gradient fields represent conservative forces, and the associated potential function is analogous to potential energy associated with said conservative forces. The Intersect Rule provides a new, unique shortcut for determining if a vector field is conservative and deriving potential functions, by treating the indefinite integral as a set of infinitely many functions which satisfy the integral.
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