| 二元函数可微的一个充要条件 |
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| 引用本文： | 冯小华. 二元函数可微的一个充要条件[J]. 石家庄职业技术学院学报, 2000, 0(3) |
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| 作者姓名： | 冯小华 |
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| 作者单位： | 廊坊教育学院数学系!河北廊坊065000 |
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| 摘 要： | 对现行教材中 f(x ,y)在点 p(x0 ,y0 )处可微的必要、充分性做了分析 ,给出了f(x ,y)在点p(x0 ,y0 )处可微的充分必要条件
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| 关 键 词： | 充分性 必要性 充要条件 |
A Nacessary and Full Condition to the Defferential Duality Funtion |
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| FENG Xiao hua. A Nacessary and Full Condition to the Defferential Duality Funtion[J]. Journal of Shijiazhuang Vocational Technology Institute, 2000, 0(3) |
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| Authors: | FENG Xiao hua |
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| Abstract: | This article makes an analysis on the necessary and full condition to the differential duality function of f(x,y )at the point P(x 0,y 0) and presents a necessary and full condition about it. |
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| Keywords: | differntial partial derivative a full and necessary condition |
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