【摘要】 在曲线正交坐标系中证明了荦算符3个有用运算公式,通过实例说明公式方便及易用,应将此3个公式列入戴尔算符常用运算公式中,这样避免了经常查阅具体坐标系中荦算符的表达式及繁杂的计算.更多还原

【Abstract】 The article proves three useful formulae for operator ▽ operation in curvilinear orthogonal coordinates, and shows that the formulas are convenient and easy to use through the examples.It suggests that these three formulas should be listed in Del operator common operation formulas.Then, it would avoid looking up frequently the concrete operator expression in coordinates and avoid multifarious calculating.更多还原