摘要
在数学和物理学中存在着一些量 ,从数学的角度来看 ,它们与所用的坐标系无关 ,可以从一个坐标系下的表达式转换成另一个坐标系下的表达式 。
There exist some quantities in mathematics and physics. From the view of mathematics, they have no relation to the chosen coordinate system and may transform from the mathematical expression of one coordinate system into that of another coordinate system. These quantities are called mathematical Invariable quantities. It starts from making use of four examples to illustrate the concept.
出处
《北京联合大学学报》
CAS
2001年第4期62-65,共4页
Journal of Beijing Union University
关键词
数学不变量
全微分
应力向量
应力矩阵
曲面
法矢
mathematical invariable quantities
differential coefficient of multivariate function
stress vector
stress matrix
normal vector of curved surface
