Computation of Trace and Nodal Points of Eigenfunctions for a Sturm-Liouville Problem with Retarded Argument
Abstract
In this study, a formula for regularized sums of eigenvalues and nodal
points of eigenfunctions for a discontinuous Sturm-Liouville problem with a
constant retarded argument. Contrary to standart problems the spectral
parameter appears not only in the differential equation, but also in one of the
boundary conditions. Thus, we see whether the nodal points of eigenfunctions
and the trace change or not.
Keywords
References
- [1]. Norkin S.B., Differential equations of the second order with retarded argument, Translations of Mathematical Monographs, AMS, Providence, RI, 1972.
- [2]. Mukhtarov O.Sh., Kadakal M., Muhtarov F.S., On discontinuous Sturm-Liouville problems with transmission conditions, J. Math. Kyoto Univ., 44-4 (2004) 779-798.
- [3]. Mukhtarov O.Sh., Tunç E., Eigenvalue problems for Sturm--Liouville equations with transmission conditions, Israel J. Math. 144 (2004) 367--380.
- [4]. Aydemir K., Mukhtarov O.Sh., Class of Sturm-Liouville problems with eigenparameter dependent transmission conditions, Numer. Funct. Anal. Optim., 38-10 (2017) 1260-1275.
- [5]. Çakmak Y., Keskin B., Uniqueness theorems for Sturm-Liouville operator with parameter dependent boundary conditions and finite number of transmission conditions, Cumhuriyet Sci. J., 38-3 (2017) 535-543.
- [6]. Kandemir M., Asymptotic distribution of eigenvalues for fourth-order boundary-value problem with discontinuous coefficients and transmission conditions, Commun. Fac. Sci. Univ. Ank. Ser. A1 Math. Stat., 66-1 (2017) 133-152.
- [7]. Li K., Sun J., Hao X., Weyl function of Sturm-Liouville problems with transmission conditions at finite interior points, Mediter. J. Math., 14-189 (2017) 1-15.
- [8]. Uğurlu E., Taş K., A new method for dissipative dynamic operator with transmission conditions, Complex Anal. Oper. Theory, 12 (2018) 1027-1055.
- [9]. Zettl A., Adjoint and self-adjoint boundary value problems with interface conditions, SIAM J. Appl. Math., 16 (1968) 851-859.
- [10]. Buschmann D., Stolz G., Weidmann J., One-dimensional Schrödinger operators with local point interactions, J. Reine Angew. Math., 467 (1995) 169-186.