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Consider a one dimensional nonlinear reaction-diffusion equation
(KPP equation) with non-homogeneous second order term, discontinuous
initial condition and small parameter. For points ahead
of the Freidlin-KPP front, the solution tends to 0 and we obtain
sharp asymptotics (i.e. non logarithmic). Our study follows the
work of Ben Arous and Rouault who solved this problem in the
homogeneous case. Our proof is probabilistic, and is based on
the Feynman-Kac formula and the large deviation principle...
This paper gives a rigorous derivation
of a functional proposed by Aftalion and Rivière [Phys. Rev. A64 (2001) 043611]
to characterize the energy of vortex filaments
in a rotationally forced Bose-Einstein condensate. This
functional is derived as a Γ-limit
of scaled versions of the Gross-Pitaevsky
functional for the wave function of such a condensate. In most situations,
the vortex filament energy functional is either unbounded below
or has only trivial minimizers, but
we establish the existence...
We consider the problemwhere is a smooth and bounded domain,
In this survey paper, we are concerned with the zero Mach number limit for compressible viscous flows. For the sake of (mathematical) simplicity, we restrict ourselves to the case of barotropic fluids and we assume that the flow evolves in the whole space or satisfies periodic boundary conditions. We focus on the case of ill-prepared data. Hence highly oscillating acoustic waves are likely to propagate through the fluid. We nevertheless state the convergence to the incompressible Navier-Stokes equations...
In this survey paper,
we are concerned with the zero Mach number limit
for compressible viscous flows.
For the sake of (mathematical) simplicity,
we restrict ourselves to the case of barotropic
fluids and we
assume that the flow evolves in the whole space
or satisfies periodic boundary conditions. We focus on the case of ill-prepared data.
Hence highly oscillating acoustic waves
are likely to propagate through the fluid.
We nevertheless state
the convergence to the incompressible Navier-Stokes...
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