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arXiv 1905.06552math.CA
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二阶线性常微分方程的稳定性准则

Stability criteria for second order linear ordinary differential equations

G. A. Grigorian

摘要:

利用Riccati方程解的一些性质,建立了二阶线性常微分方程解的有界性和稳定性准则。我们表明,在已证明的标准中出现的方程的系数的条件,不遵循的条件,这确保了应用程序的WKB近似的二阶线性方程。在这些例子中,我们比较所得到的结果与所得到的结果由Liapunov和Bogdanov方法,通过一种方法,涉及估计的解决方案中的Lozinski的对数规范,并通过冻结方法。我们将这些结果与Wazevski定理进行了比较。

英文摘要:

We use some properties of solutions of Riccati equation for establishing boundedness and stability criteria for solutions of second order linear ordinary differential equations. We show that the conditions on coefficients of the equations, appearing in the proven criteria, do not follow from the conditions, which ensure the application of the WKB approximation to the second order linear equations. On these examples we compare the obtained results wit the results obtained by the Liapunov and Bogdanov methods, by a method involving estimates of solutions in the Lozinski's logarithmic norms, and by the freezing method. We compare these results with the Wazevski's theorem as well.

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