11 papers
On a generalized class of boundary-value problems with delayed argument
Erdoğan Şen
In this work, spectrum and asymptotics of eigenfunctions of a generalized class of boundary value problems with a delay are obtained.
Traces and inverse nodal problems for a class of Sturm-Liouville operators with retarded argument
Erdoğan Şen
In this study, we investigate the traces and solutions of inverse nodal problems of discontinuous Sturm-Liouville operators with retarded argument and with a finite number of trans…
Spectrum, trace and oscillation of a Sturm-Liouville type retarded differential operator with interface conditions
Erdoğan Şen
In this study, a formula for regularized sums of eigenvalues of a Sturm-Liouville problem with retarded argument at the point of discontinuity is obtained. Moreover, oscillation pr…
A New Theorem on N-th Order Differential Equation with Retarded Argument
Erdoğan Şen
In this work, using the well-known mean-value theorem (Lagrange's theorem) we obtain an inequality for n-th order differential equations with retarded argument. If the retarded arg…
Asymptotic expressions of eigenvalues and eigenfunctions of a discontinuous boundary value problem with retarded argument which contains a spectral parameter in the boundary conditon
Erdoğan Şen
The aim of this study is to find asymptotic expressions of eigenvalues and eigenfunctions of a discontinuous boundary-value problem with retarded argument which contains a spectral…
Fibonacci Numbers, Golden Section and Applications
Erdoğan Şen
In this thesis we examined mathematical properties of Fibonacci numbers and applications of this numbers in the nature,geometry and economy.We obtained Golden section and proved so…