This identical equation establishment这个恒等式成立

differential identical equation微分恒等式

combinatorial identical equation组合诅恒等式;组合恒等式

macro economic identical equation宏观经济恒等式

algebraic identical equation代数恒等式

an identical equation恒等式

energetics identical equation热力学恒等式

Bianchi identical equationBianchi恒等式

Lagrange identical equation拉格朗日恒等式