Curves of steepest descent are entropy solutions for a class of degenerate convection–diffusion equations
M Di Francesco, D Matthes�- Calculus of Variations and Partial Differential�…, 2014 - Springer
Calculus of Variations and Partial Differential Equations, 2014•Springer
We consider a nonlinear degenerate convection–diffusion equation with inhomogeneous
convection and prove that its entropy solutions in the sense of Kružkov are obtained as the—
a posteriori unique—limit points of the JKO variational approximation scheme for an
associated gradient flow in the L^ 2 L 2-Wasserstein space. The equation lacks the
necessary convexity properties which would allow to deduce well-posedness of the initial
value problem by the abstract theory of metric gradient flows. Instead, we prove the entropy�…
convection and prove that its entropy solutions in the sense of Kružkov are obtained as the—
a posteriori unique—limit points of the JKO variational approximation scheme for an
associated gradient flow in the L^ 2 L 2-Wasserstein space. The equation lacks the
necessary convexity properties which would allow to deduce well-posedness of the initial
value problem by the abstract theory of metric gradient flows. Instead, we prove the entropy�…
Abstract
We consider a nonlinear degenerate convection–diffusion equation with inhomogeneous convection and prove that its entropy solutions in the sense of Kružkov are obtained as the—a posteriori unique—limit points of the JKO variational approximation scheme for an associated gradient flow in the -Wasserstein space. The equation lacks the necessary convexity properties which would allow to deduce well-posedness of the initial value problem by the abstract theory of metric gradient flows. Instead, we prove the entropy inequality directly by variational methods and conclude uniqueness by doubling of the variables.
Springer