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# Article

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Keywords:
integrating factor
Summary:
The problem of integrating factor for ordinary differential equations is investigated. Conditions are given which guarantee that each solution of $\partial_1F(x,y)+y'\partial_2F(x,y)=0$ is also a solution of $M(x,y)+y'N(x,y)=0$ where $\partial_1F=\mu M$ and $\partial_2F=\mu N$.
References:
[1] W.T. Reid: Ordinary differential equations. Wiley, New York, 1971. MR 0273082 | Zbl 0212.10901

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