2020
DOI: 10.3390/sym12121989
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Multiple Solutions for a Class of Nonlinear Fourth-Order Boundary Value Problems

Abstract: This paper is concerned with multiple solutions for a class of nonlinear fourth-order boundary value problems with parameters. By constructing a special cone and applying fixed point index theory, the multiple solutions for the considered systems are obtained under some suitable assumptions. The main feature of obtained solutions (u(t),v(t)) is that the solution u(t) is positive, and the other solution v(t) may change sign. Finally, two examples with continuous function f1 being positive and f2 being semiposit… Show more

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Cited by 4 publications
(1 citation statement)
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“…For instance, the deformation of an elastic beam under an external force h supported at both ends is described by the linear boundary value problem x (4) (t) = h(t), t ∈ (0, 1), x(0) = x(1) = x ′′ (0) = x ′′ (1) = 0, where vanishing moments at the ends of the attached beam motivate the boundary conditions (see [9] for more details). The existence of solutions for nonlinear fourth-order BVPs has gained much interest in the last years (see, e.g., [2,3,4,6,10,11,12,13,15,17]). Boundary value problems with integral boundary conditions constitute a very interesting and important class of problems.…”
Section: Introductionmentioning
confidence: 99%
“…For instance, the deformation of an elastic beam under an external force h supported at both ends is described by the linear boundary value problem x (4) (t) = h(t), t ∈ (0, 1), x(0) = x(1) = x ′′ (0) = x ′′ (1) = 0, where vanishing moments at the ends of the attached beam motivate the boundary conditions (see [9] for more details). The existence of solutions for nonlinear fourth-order BVPs has gained much interest in the last years (see, e.g., [2,3,4,6,10,11,12,13,15,17]). Boundary value problems with integral boundary conditions constitute a very interesting and important class of problems.…”
Section: Introductionmentioning
confidence: 99%