# American Institute of Mathematical Sciences

January  1999, 5(1): 1-34. doi: 10.3934/dcds.1999.5.1

## Monotonicity and convergence results in order-preserving systems in the presence of symmetry

 1 Laboratory of Nonlinear Studies and Computation, Research Institute for Electronic Science, Hokkaido University, Kita-ku, Sapporo 060, Japan 2 Graduate School of Mathematical Sciences, University of Tokyo, Komaba Tokyo, 153-8914

Revised  September 1998 Published  October 1998

This paper deals with various applications of two basic theorems in order- preserving systems under a group action -- monotonicity theorem and convergence theorem. Among other things we show symmetry properties of stable solutions of semilinear elliptic equations and systems. Next we apply our theory to traveling waves and pseudo-traveling waves for a certain class of quasilinear diffusion equa- tions and systems, and show that stable traveling waves and pseudo-traveling waves have monotone profiles and, conversely, that monotone traveling waves and pseudo- traveling waves are stable with asymptotic phase. We also discuss pseudo-traveling waves for equations of surface motion.
Citation: Toshiko Ogiwara, Hiroshi Matano. Monotonicity and convergence results in order-preserving systems in the presence of symmetry. Discrete and Continuous Dynamical Systems, 1999, 5 (1) : 1-34. doi: 10.3934/dcds.1999.5.1
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