Yuan, YapingSun, JiongZettl, Anton2022-08-172022-08-172017-10-19Yuan, Y., Sun, J., & Zettl, A. (2017). Inequalities among eigenvalues of Sturm Liouville equations with periodic coefficients. <i>Electronic Journal of Differential Equations, 2017</i>(264), pp. 1-13.1072-6691https://hdl.handle.net/10877/16065It is well known that for h-periodic coefficients, every periodic eigenvalue on every interval [a,a+kh], k=2,3,4,..., is also an eigenvalue on the interval [a,a+h] of a periodic, semi-periodic or complex self-adjoint boundary condition. Here we give an explicit 1-1 correspondence between these eigenvalues.Text13 pages1 file (.pdf)enAttribution 4.0 InternationalPeriodic coefficientsEigenvalue inequalities and equalitiesArticleThis work is licensed under a Creative Commons Attribution 4.0 International License.