| 关于有界函数导数的估计 |
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| 引用本文： | 苑文法,温金环. 关于有界函数导数的估计[J]. 纯粹数学与应用数学, 2001, 17(4): 358-362 |
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| 作者姓名： | 苑文法 温金环 |
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| 作者单位： | 三峡大学数学系,湖北,宜昌,443003;西北工业大学应用数学系,西安,710072;西北工业大学应用数学系,西安,710072 |
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| 摘 要： | 主要讨论了有界函数的导数估计问题,得到三阶导数、四阶导数的准确估计式。
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| 关 键 词： | 有界函数 正则函数 正实部函数 最大模原理 |
| 文章编号： | 1008-5513(2001)04-0358-05 |
| 修稿时间： | 2000-11-20 |
Estimation of derivative for bounded functions |
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| YUAN Wen fa ,,WEN Jin huan. Estimation of derivative for bounded functions[J]. Pure and Applied Mathematics, 2001, 17(4): 358-362 |
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| Authors: | YUAN Wen fa WEN Jin huan |
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| Affiliation: | YUAN Wen fa 1,2,WEN Jin huan 2 |
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| Abstract: | In this paper, We discuss the problem of estimating the derivate of bounded functions. the sharp bounds for the third and forth derivative of bounded functions are given. The main results obtained here generalize several known results. |
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| Keywords: | bounded functions regular function estimation positive real part function maximum modulus principle |
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