Wenxue li put forward a sufficient condition of conditional extreme value with Lagrange function but his proof is wrong.
摘要李文学用拉格朗日函数提出求条件极值的充分条件，但他的证明却是错误的。
Is also a function of extreme value theory, and many other mathematical theory of power series basis.
也是函数的极值、幂级数理论等众多数学理论的基础。
The general conclusion is derived by using the features that moment of inertia is a function of the Angle of rotation and the function has extreme value.
该方法利用惯性矩是方位角的函数，且函数有极值的特征推出普遍性结论。
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