References
- H. Behncke, Spectral theory of higher order differential operators, Proc. London Math. Soc., 93(1)(2006), 139-160. https://doi.org/10.1017/S0024611505015480
- H. Behncke, Spectral analysis of fourth order differential operators III, Math. Nachr., 283(11)(2010), 1558-1574. https://doi.org/10.1002/mana.200710227
- H. Behncke and D. Hinton, Spectral theory of hamiltonian systems with almost constant coefficients, J. Differential Equations, 250(2011), 1408-1426. https://doi.org/10.1016/j.jde.2010.10.014
- H. Behncke and F. O. Nyamwala, Spectral theory of difference operators with almost constant coefficients, J. Difference Equ. Appl., 17(5)(2011), 677-695. https://doi.org/10.1080/10236190903160681
- H. Behncke and F. O. Nyamwala, Spectral theory of higher order difference operators, J. Difference Equ. Appl., 19(12)(2013), 1983-2028. https://doi.org/10.1080/10236198.2013.797968
- D. B. Hinton and A. Schneider, On the Titchmarsh-Weyl coefficients for S-Hermitian systems I, Math. Nachr., 163(1993), 323-342. https://doi.org/10.1002/mana.19931630127
- C. Remling, The absolutely continuous spectrum of one-dimensional Schrodinger operators, Math. Phys. Anal. Geom., 10(2007), 359-373. https://doi.org/10.1007/s11040-008-9036-9
- C. Remling, The absolutely continuous spectrum of Jacobi matrices, Ann. Math., 174(2011), 125-171. https://doi.org/10.4007/annals.2011.174.1.4
- P. Walker, A vector-matrix formulation for formally symmetric ordinary differential equations with applications to solutions of integrable square, J. London Math. Soc., 9(1974/75), 151-159.
- J. Weidmann, Spectral theory of ordinary differential operators, Lecture Notes in Mathematics 1258, Springer-Verlag, Berlin, 1987.
- Y. Shi, Weyl-Titchmarsh theory for a class of discrete linear Hamiltonian systems, Linear Algebra Appl., 416(2006), 452-519. https://doi.org/10.1016/j.laa.2005.11.025