| 多元函数极值判别法的推广 |
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| 引用本文： | 宁荣健,方毅. 多元函数极值判别法的推广[J]. 合肥工业大学学报(自然科学版), 1993, 0(4) |
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| 作者姓名： | 宁荣健 方毅 |
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| 摘 要： | 本文建立了一个二元函数在不可导点处的极值判别定理,并利用了高阶编导数和对称矩阵的性质,推广了二元函数极值的二阶编导数判别定理。
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| 关 键 词： | 极值 高阶偏导数 下场定矩阵 负定矩阵 |
THE EXTENSION OF TEST ABOUT EXTREME VALUES OF FUNCTIONS OF MANY VARIABIES |
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| Ning Rongjian Fang Yi. THE EXTENSION OF TEST ABOUT EXTREME VALUES OF FUNCTIONS OF MANY VARIABIES[J]. Journal of Hefei University of Technology(Natural Science), 1993, 0(4) |
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| Authors: | Ning Rongjian Fang Yi |
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| Affiliation: | Ning Rongjian Fang Yi |
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| Abstract: | In this paper, we give a test about extreme values at poiuts of functions of twe variabies,at those points one or tooth partial derivative may not exist. And using higher-order panial derivative and symmetric matrix's characters,extend the second partials test about extreme values of functions of two variabies. |
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| Keywords: | extreme value higher-order partial derivative positive definite matrix negative definite matrix. |
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