In this paper we consider a spectral problem for ordinary differential equations of fourth
order with the spectral parameter contained in three of the boundary conditions. We study …

In this article, we consider a discrete right-definite Sturm-Liouville problems with two
squared eigenparameter-dependent boundary conditions. By constructing some new …

The inverse problem concerns how to reconstruct the operator from given spectral data. The
main goal of this paper is to address nonlinear inverse Sturm–Liouville problem with …

This paper is concerned with discontinuous inverse problem generated by complex-valued
weight Sturm–Liouville differential operator with λ-dependent boundary conditions. We …

Consider the linear eigenvalue problem of fourth-order y (4)(x)−(q (x) y (x))= λy (x), 0< x< l, y
(0)= y (0)= 0,(a0+ a1λ+ a2λ2) y (l)+(b0+ b1λ+ b2λ2) y (l)= 0, y (l) cosδ− Ty (l) sinδ= 0, where …

This paper aims to investigate the scattering function and discrete spectrum of the impulsive
Sturm‐Liouville type differential operator with a turning point and nonlinear eigenparameter …

一类离散左定Sturm-Liouville问题的谱 Page 1 山东大学学报(理学版)2021年9月第56卷第9期
E-mail:xblxb@sdu.edu.cn Journal of Shandong University (Natural Science)ꎬ Vol.56ꎬ No.9ꎬ …

为了探究海水养殖循环系统不同功能区域微生物群落结构特征ꎬ 深入了解水质理化因子与
微生物群落之间的相关性ꎬ 通过16S rRNA 扩增子高通量测序技术对系统不同功能区域水体 …

Consider positive solutions and multiple positive solutions for a discrete nonlinear third-
order boundary value problem {Δ 3 u (t− 1)= a (t) f (t, u (t)), t∈[1, T− 2] Z, Δ u (0)= u (T)= 0, Δ …

In this paper, the numerical estimations for the eigenfunctions corresponding to the
eigenvalues of Sturm-Liouville problem with periodic and semi-periodic boundary conditions …