Abstract
In this article, we establish the existence of solutions for a fourth-order four-point non-linear boundary value problem (BVP) which arises in bridge design, $$\displaylines{ - y^{(4)}( s)-\lambda y''( s)=\mathcal{F}( s, y( s)), \quad s\in(0,1),\cry(0)=0,\quad y(1)= \delta_1 y(\eta_1)+\delta_2 y(\eta_2),\cr y''(0)=0,\quad y''(1)= \delta_1 y''(\eta_1)+\delta_2 y''(\eta_2), }$$ where \(\mathcal{F} \in C([0,1]\times \mathbb{R},\mathbb{R})\), \(\delta_1, \delta_2>0\), \(0<\eta_1\le \eta_2 <1\), \(\lambda=\zeta_1+\zeta_2 \), where \(\zeta_1\) and \(\zeta_2\) are the real constants. We have explored all gathered \(0<\zeta_1<\zeta_2\), \(\zeta_1<0<\zeta_2\), and \( \zeta_1<\zeta_2<0 \). We extend the monotone iterative technique and establish the existence results with reverse ordered upper and lower solutions to fourth-orderfour-point non-linear BVPs.
For more information see https://ejde.math.txstate.edu/Volumes/2023/51/abstr.html
Reference44 articles.
1. Ravi P Agarwal, Leonid Berezansky, Elena Braverman, Alexander Domoshnitsky; Nonoscillation theory of functional differential equations with applications, Springer Science & Business Media, 2012.
2. D. R. Anderson, R. I. Avery; A fourth-order four-point right focal boundary value problem, The Rocky Mountain Journal of Mathematics (2006), 367–380.
3. N. V. Azbelev, A. Domoshnitsky; A question concerning linear differential inequalities, Differentsial’nye uravnenija 27 (1991), no. 1, 257–263.
4. Nikolaj V. Azbelev, Viktor Petrovich Maksimov, L Rakhmatullina; Introduction to the theory of linear functional differential equations, vol. 3, World Federation Publishers, Incorporated, 1995.
5. N. V. Azbelev, VP Maksimov, L. F. Rakhmatullina; Introduction to the theory of functional differential equations, Nauka, Moscow, Russian, vol. 34123, 1991.