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arXiv 0910.1377math-phmath.MP
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两个常系数Riccati方程的周期Sturm-Liouville问题

Periodic Sturm-Liouville problems related to two Riccati equations of constant coefficients

K. V. Khmelnytskaya, H. C. Rosu, A. Gonzalez

摘要:

我们考虑两个密切相关的常参数Riccati方程,其特殊的解决方案是用来构建相应的一类supercritically耦合二阶微分方程。我们解析地解决这些参数周期问题沿正实轴。接下来,分析解决的模型被用作一个强大的数值方法,在这里首次采用的周期性的不一定规则的潜力的能量能带结构的调查的情况下研究。该方法基于James(1949)的著名自匹配过程,并实现了Kravchenko(2008)介绍的谱参数幂级数解。我们还得到了基于Kravchenko级数的Hill判别式的有效级数表示

英文摘要:

We consider two closely related Riccati equations of constant parameters whose particular solutions are used to construct the corresponding class of supersymmetrically-coupled second-order differential equations. We solve analytically these parametric periodic problems along the positive real axis. Next, the analytically solved model is used as a case study for a powerful numerical approach that is employed here for the first time in the investigation of the energy band structure of periodic not necessarily regular potentials. The approach is based on the well-known self-matching procedure of James (1949) and implements the spectral parameter power series solutions introduced by Kravchenko (2008). We obtain additionally an efficient series representation of the Hill discriminant based on Kravchenko's series

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