The Number of Solutions of a Nonlinear Two Point Boundary Value Problem

Positive solutions of a nonlinear three-point boundary value problem

We study the existence of positive solutions to the boundary-value problem u + a(t)f(u) = 0, t ∈ (0, 1) u(0) = 0, αu(η) = u(1) , where 0 < η < 1 and 0 < α < 1/η. We show the existence of at least one positive solution if f is either superlinear or sublinear by applying the fixed point theorem in cones.

Existence of positive solutions for a boundary value problem of a nonlinear fractional differential equation

This paper presents conditions for the existence and multiplicity of positive solutions for a boundary value problem of a nonlinear fractional differential equation. We show that it has at least one or two positive solutions. The main tool is Krasnosel'skii fixed point theorem on cone and fixed point index theory.

Existence of nodal solutions of a nonlinear fourth-order two-point boundary value problem

Correspondence: [email protected] School of Mathematics and Statistics, Lanzhou University, Lanzhou 730000, People’s Republic of China Full list of author information is available at the end of the article Abstract In this article, we give conditions on parameters k, l that the generalized eigenvalue problem x′′′′ + kx′′ + lx = lh(t)x, 0 < t <1, x(0) = x(1) = x′(0) = x′(1) = 0 possesses an inf...

Triple Positive Solutions for Boundary Value Problem of a Nonlinear Fractional Differential Equation

TRIPLE SOLUTIONS FOR NONLINEAR SINGULAR m-POINT BOUNDARY VALUE PROBLEM

In this paper, we study the existence of three solutions to the following nonlinear m-point boundary value problem  u′′(t) + βu(t) = h(t)f(t, u(t)), 0 < t < 1, u′(0) = 0, u(1) = m−2 ∑ i=1 αiu(ηi), where 0 < β < π2 , f ∈ C([0, 1] × R ,R). h(t) is allowed to be singular at t = 0 and t = 1. The arguments are based only upon the Leggett-Williams fixed point theorem. We also prove nonexist results.