IMA Journal of Applied Mathematics Advance Access originally published online on January 8, 2009
IMA Journal of Applied Mathematics 2009 74(2):296-323; doi:10.1093/imamat/hxn037
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Inhomogeneous spatial patterns for predator–prey models: bifurcation at a higher eigenvalue

Department of Mathematics, University of Alabama at Birmingham, Birmingham, AL 35294, USA; Department of Mathematics Johns Hopkins University, Baltimore, MD 21218, USA
Email: zou{at}math.uab.edu
Received on February 18, 2008; Revision received September 25, 2008. Accepted on October 23, 2008
In this paper, we study a Rosenzweig–MacArthur predator–prey (steady-state) model with diffusion and subject to homogeneous Neumann boundary conditions. Namely, we consider the following system of elliptic equations:
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Rn (n
2) is a bounded and smooth domain. We call a pair of smooth (say, C2(
)) functions u(x) and v(x) which are strictly positive and non-constant in the region
and satisfy the above system a spatially inhomogeneous pattern. Employing global bifurcation theory and exploring the global structure of the system, we obtain new existence results of spatially inhomogeneous patterns of large amplitude and global nature.
Keywords: bifurcation; existence; Neumann boundary data; predator–prey; spatial patterns.
