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5 papers

math.AP2026

From diffusion to transmission via EDP-convergence: a paradigmatic multiscale limit

Thomas Frenzel, Alexander Mielke

The paper analyzes how nonlinear diffusion equations with a highly localized diffusion coefficient converge, in the energy‑dissipation principle sense, to a transmission condition…

math.AP2026

Derivation of the fourth-order DLSS equation with nonlinear mobility via chemical reactions

Alexander Mielke, André Schlichting, Artur Stephan

We provide a derivation of the one-dimensional fourth-order DLSS equation based on an interpretation as a chemical reaction network. We consider the rate equation on the discretize…

math.PR2026

Degenerate Diffusions on Continuum Percolation and Hamilton-Jacobi-Bellman Equations

Rodrigo Bazaes, Alexander Mielke, Chiranjib Mukherjee

We study degenerate controlled diffusions and Hamilton--Jacobi--Bellman equations posed on genuine continuum percolation clusters. The diffusion is constrained to evolve inside the…

math.AP2026

On the equilibrium solutions of electro-energy-reaction-diffusion systems

Katharina Hopf, Michael Kniely, Alexander Mielke

Electro-energy-reaction-diffusion systems are thermodynamically consistent continuum models for reaction-diffusion processes that account for temperature and electrostatic effects…

math.AP2025

Discrete-to-continuum limit for nonlinear reaction-diffusion systems via EDP convergence for gradient systems

Georg Heinze, Alexander Mielke, Artur Stephan

We investigate the convergence of spatial discretizations for reaction-diffusion systems with mass-action law satisfying a detailed balance condition. Considering systems on the d-…