Campus Units
Mathematics
Document Type
Article
Publication Version
Accepted Manuscript
Publication Date
12-1-1996
Journal or Book Title
Journal of Mathematical Analysis and Applications
Volume
204
Issue
2
First Page
494
Last Page
521
DOI
10.1006/jmaa.1996.0451
Abstract
In this paper, we consider the system \arraycolsep0.14em\begin{array}{rcl {\hskip2em}rcl {\hskip2em}c}u_t&=&\Delta u+v^p,&v_t&=&\Delta v&x\in{\Bbb R}_{+}^N,t>0,\\ \displaystyle-{\partial u\over\partial x_t}&=&0,&\displaystyle-{\partial v\over\partial x_t}&=&u^q&x_1=0,t>0,\\ u(x,0)&=&u_0(x),&v(x,0)&=&v_0(x)&x\in{\Bbb R}_{+}^N, whereR" role="presentation" style="box-sizing: border-box; display: inline-block; line-height: normal; font-size: 14.4px; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">RN+={(x1, x′)|x′∈R" role="presentation" style="box-sizing: border-box; display: inline-block; line-height: normal; font-size: 14.4px; word-spacing: normal; word-wrap: normal; white-space: nowrap; float: none; direction: ltr; max-width: none; max-height: none; min-width: 0px; min-height: 0px; border: 0px; padding: 0px; margin: 0px; position: relative;">RN−1, x1>0}, p, q>0, andu0, v0are nonnegative and bounded. We prove that ifpq≤1 every nonnegative solution is global. Whenpq>1 we let α=(p+2)/2(pq−1), β=(2q+1)/2(pq−1). We show that if max(α, β)>N/2 or max(α, β)=N/2 andp, q≥1, then all nontrivial nonnegative solutions are nonglobal; whereas if max(α, β)<N/2 there exist both global and nonglobal nonnegative solutions.
Copyright Owner
Elsevier Inc.
Copyright Date
1996
Language
en
File Format
application/pdf
Recommended Citation
Fila, Marek and Levine, Howard A., "On Critical Exponents for a Semilinear Parabolic System Coupled in an Equation and a Boundary Condition" (1996). Mathematics Publications. 167.
https://lib.dr.iastate.edu/math_pubs/167
Included in
Numerical Analysis and Computation Commons, Ordinary Differential Equations and Applied Dynamics Commons
Comments
This is a manuscript of an article published as Fila, Marek, and Howard A. Levine. "On critical exponents for a semilinear parabolic system coupled in an equation and a boundary condition." Journal of mathematical analysis and applications 204, no. 2 (1996): 494-521. DOI: 10.1006/jmaa.1996.0451. Copyright 1996 Elsevier Ltd. Posted with permission.