identical equation meaning in Chinese

恒等式

The technique about some mathematical identical equation
关于某些数学恒等式的证明技巧
Extending and prove for a identical equation of combination
一个组合恒等式的推广及证明
An integral identical equation is presented which hold generally true for theory of engineering elasticity
提出了一个对于工程弹性力学普遍成立的积分恒等式。
Chapter two is focused on the wang - ball curves , including definition , properties and recursive algorithms . using the dual functional of the wang - ball basis , the author derives the subdivision algorithms for the wang - ball curves for the first time and then obtains some identical equations of calculation combination
第二章介绍wang - ball曲线的定义及性质，以及wang - ball曲线的递归求值算法，利用wang - ball基函数的对偶泛函，作者在这里给出wang - ball曲线的显式细分算法，并由此导出几个计算组合恒等式。