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Eighth Mississippi State - UAB Conference on Differential Equations & Computational Simulations
May 7-9, 2009
Department of Mathematics and Statistics, Mississippi State University
Mississippi State, MS, USA

Organizers
Mississippi State University & University of Alabama - Birmingham

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On the existence of a double S-shaped bifurcation curve
by
Jerome Goddard, II
Department of Mathematics and Statistics, Mississippi State University
Coauthors: E. Lee (Mississippi State University), R. Shivaji (Mississippi State University)

Abstract

We analyze the structure of the bifurcation curve of positive solutions to the two-point boundary value problem,
-u" = le[(bu)/(b+ u)];     (0, 1)
with nonlinear boundary conditions:
-a(x, u) u'+ [1 - a(x, u)]u
=
0;     x = 0
a(x, u) u'+ [1 - a(x, u)]u
=
0;     x = 1.

Here, b and l are positive parameters and a(x, u) is the fraction of what u represents that remains on the boundary. In particular, we consider the case when
a(x, u) = 0;     x = 0
a(x, u) = u

u + 1
;     x = 1.

We will discuss the existence of 6 positive solutions for a certain range of l when b is sufficiently large.

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Date received: April 7, 2009


Copyright © 2009 by the author(s). The author(s) of this document and the organizers of the conference have granted their consent to include this abstract in Atlas Conferences Inc. Document # cayt-48.