2005/03/23 by Nikos I. Karachalios, Karachalios, Nikos I., Nikos B. Zographopoulos +1
Computer Science · Engineering · Mathematics · #35B40 #35B41 #35R05 #Advanced Mathematical Modeling in Engineering #Analysis of PDEs (math.AP) #Dynamical Systems (math.DS) #FOS: Mathematics #Nonlinear Partial Differential Equations #Stability and Controllability of Differential Equations #math.AP #math.DS #msc:35B40 #msc:35B41 #msc:35R05
paper · pdf · doi:10.48550/arxiv.math/0503486
28 pages. To appear in Calculus of Variations and Partial Differential Equations. The original publication will appear at www.springerlink.com
openalex publication_date 2005/03/23 · arxiv created 2005/05/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We study the dynamics of a degenerate parabolic equation with a variable, generally non-smooth diffusion coefficient, which may vanish at some points or be unbounded. We show the existence of a global branch of nonnegative stationary states, covering both the cases of a bounded and an unbounded domain. The global bifurcation of stationary states, implies-in conjuction with the definition of a gradient dynamical system in the natural phase space-that at least in the case of a bounded domain, any solution with nonnegative initial data tends to the trivial or the nonnegative equilibrium. Applications of the global bifurcation result to general degenerate semilinear as well as to quasilinear elliptic equations, are also discussed.