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Fully adaptive multiresolution schemes for strongly degenerate parabolic equations in one space dimension

Raimund BürgerRicardo RuizKai SchneiderMauricio Sepúlveda — 2008

ESAIM: Mathematical Modelling and Numerical Analysis

We present a fully adaptive multiresolution scheme for spatially one-dimensional quasilinear strongly degenerate parabolic equations with zero-flux and periodic boundary conditions. The numerical scheme is based on a finite volume discretization using the Engquist-Osher numerical flux and explicit time stepping. An adaptive multiresolution scheme based on cell averages is then used to speed up the CPU time and the memory requirements of the underlying finite volume scheme, whose first-order...

Exponential wealth distribution : a new approach from functional iteration theory

Ricardo López-RuizJosé-Luis LópezXavier Calbet — 2012

ESAIM: Proceedings

Different approaches are possible in order to derive the exponential regime in statistical systems. Here, a new functional equation is proposed in an economic context to explain the wealth exponential distribution. Concretely, the new iteration [1] given by f n + 1 ( x ) = u + v > x f n ( u ) f n ( v ) u + v d u d v . It is found that the exponential distribution is a stable fixed point of this functional iteration equation. From this point of view, it is easily understood why the exponential wealth distribution...

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