Please use this identifier to cite or link to this item:
http://hdl.handle.net/10397/88688
Title: | An optimal existence theorem for positive solutions of a four-point boundary value problem | Authors: | Kwong, MK Wong, JSW |
Issue Date: | 22-Dec-2009 | Source: | Electronic journal of differential equations, 22 Dec. 2009, 165, p. 1-8 | Abstract: | We are interested in the existence of positive solutions to a four-point boundary value problem of the differential equation y ''(t)+ a(t) f(y(t)) = 0 on [0, 1]. The value of y at 0 and 1 are each a multiple of y(t) at an interior point. Many known existence criteria are based on the limiting values of f(u)/u as u approaches 0 and infinity. In this article we obtain an optimal criterion (thereby improving all existing results of kind mentioned above) by comparing these limiting values to the smallest eigenvalue of the corresponding four-point problem of the associated linear equation. In the simpler case of three-point boundary value problems, the same result has been established in an earlier paper by the first author using the shooting method. The method of proof is based upon a variant of Krasnoselskii's fixed point theorem on cones, the classical Krein-Rutman theorem, and the Gelfand formula relating the spectral radius of a linear operator to its norm. | Keywords: | Four-point boundary value problem Second-order ode Krasnoselskii fixed point theorem Mappings on cones |
Publisher: | Texas State University - San Marcos | Journal: | Electronic journal of differential equations | ISSN: | 1072-6691 | EISSN: | 1550-6150 | Rights: | © 2009 Texas State University - San Marcos. This work is licensed under a Creative Commons Attribution 4.0 International License. Creative Commons License (https://creativecommons.org/licenses/by/4.0/). This is an open access journal which means that all content is freely available without charge to the users or their institutions. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the BOAI definition of open access (Also we do not have page charges). The following publication Kwong, M. K., & Wong, J. S. W. (2009). An optimal existence theorem for positive solutions of a four-point boundary value problem. Electronic Journal of Differential Equations, 165, 1-8 is available at https://ejde.math.txstate.edu/ |
Appears in Collections: | Journal/Magazine Article |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Kwong_Optimal_Existence_Theorem.pdf | 200.92 kB | Adobe PDF | View/Open |
Page views
34
Last Week
0
0
Last month
Citations as of Apr 28, 2024
Downloads
16
Citations as of Apr 28, 2024
WEB OF SCIENCETM
Citations
2
Citations as of May 2, 2024
Google ScholarTM
Check
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.