摘要: |
讨论了一阶常微分方程M(x,y)dx+N(x,y)dy=0的积分因子问题,给出了方程具有一类形如f(axα+bxsyt+cyβ)g(dxmyn)乘积形式积分因子的充要条件,并结合实例说明其应用,该结果推广了相关文献的结论. |
关键词: 一阶常微分方程 乘积形式积分因子 充要条件 应用 |
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Existence Condition of Integral Factor of the Product Form and Its Application |
LI Yao hong,PENG Ying
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Abstract: |
This paper discusses the problem of integral factor for first order differential equation M(x,y)dx+N(x,y)dx=0,and gives a sufficient and necessary condition of integral factor of the product form of f(axα+bxsyt+cyβ)g(dxmyn). The application of this method is illustrated by example. Moreover,the result obtained amplifies the conclusions in the relevant reference. |
Key words: first order differential equations integral factor of the product form sufficient and necessary condition application |