Kaouther Ammar
Abstract:
We study the degenerate differential equation
with the initial condition
on
and
boundary condition
on some part of the boundary
with
a.e. on
.
The vector field
is
assumed to satisfy the Leray-Lions conditions, and the
functions
to be continuous, locally Lipschitz, nondecreasing
and to satisfy the normalization condition
and the
range condition
.
We assume also that
has a flat region
with
.
Using Kruzhkov's method of doubling
variables, we prove an existence and comparison result
for renormalized entropy solutions.
Submitted August 15, 2009. Published November 20, 2009.
Math Subject Classifications: 35K55, 35J65, 35J70, 35B30.
Key Words: Renormalized; degenerate; diffusion;
homogenous boundary conditions; continuous flux.
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Kaouther Ammar TU Berlin, Institut für Mathematik, MA 6-3 Strasse des 17. Juni 136, 10623 Berlin, Germany email: ammar@math.tu-berlin.de, Fax: +4931421110, Tel: +4931429306 |
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