Abstract: Evolution equations with an underlying gradient flow structure have
since long been of special interest in analysis and mathematical
physics. In particular, transport equations that allow for a variational
formulation with respect to the L2-Wasserstein metric have attracted a
lot of attention recently. The gradient flow formulation gives rise to a
natural semi-discretization in time of the evolution by means of the
minimizing movement scheme, which constitutes a time-discrete
minimization problem for the (sum of kinetic and potential) energy. On
the other hand, nonlinear diffusion equations of fourth (and higher)
order have become increasingly important in pure and applied
mathematics. Many of them have been interpreted as gradient flows with
respect to some metric structure.
When it comes to solve equations of gradient flow type numerically,
schemes that respect the equation's special structure are of particular
interest. We present a fully discrete variant of the minimizing movement
scheme for the numerical solution of the nonlinear fourth order
Derrida-Lebowitz-Speer-Spohn equation in one space dimension, and
discuss possible extensions to higher approximation order and to higher
space dimensions.
Angelegt am 28.11.2012 von Martin Burger
Geändert am 28.11.2012 von Martin Burger
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