Technion - Israel Institute of Technology
 
          Department of Mathematics
 
    =====================================
     PDE AND APPLIED MATHEMATICS SEMINAR
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DATE: Tuesday, November 22, 2011
 
SPEAKER: Lenya Ryzhik, Stanford
 
TITLE: KPP spreading rate in a periodic environment
 
PLACE: Room 814, Amado Mathematics Building, Technion
 
TIME: 14:30
 
ABSTRACT: It is well known since the celebrated paper by Bramson that
solutions of the KPP type reaction-diffusion equations with compactly
supported initial data lag by distance $(3/2)\log t$ behind the
corresponding traveling front. An interesting open problem is whether
similar results on the discrepancy between the solutions of the
nonlinear and linearized problems hold in heterogeneous media. As a
first small step in this direction we consider this problem in a
periodic environment and show that the delay is still logarithmic in
time. This is a joint work with F. Hamel, J. Nolen and J.-M.
Roquejoffre.
 
For further info: Yehuda Pinchover   <pincho@techunix.technion.ac.il> 
 
For past and future Applied Math/PDE seminars see:
 <http://www.math.technion.ac.il/pde/seminar.html>
 
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Technion Math. Net (TECHMATH)
Editor: Michael Cwikel   <techm@math.technion.ac.il> 
Announcement from: Yehuda Pinchover   <pincho@tx.technion.ac.il>