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Necessary Condition for Extreme Value of Tri-Function under Two Conditions
Pages: 138-140
Year: Issue:  2
Journal: Journal of Liaoning Institute of Technology(Natural Science Edition)

Keyword:  conditional extreme valuecommon tangent of surfacestangent vector;
Abstract: 从几何上3个曲面中任2个曲面的交线在三元函数取得极值的点处有公切线出发,得出了用目标函数、条件的偏导数组成的行列式表示的三元函数在2个条件下的极值的必要条件,并通过实例验证了结论的正确性。这是不同于Lagrange乘数法的一个必要条件。
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