English

A monotonicity formula for a classical free boundary problem

Analysis of PDEs 2025-04-03 v1

Abstract

We construct a monotonicity formula for the free boundary problem of the form Δu=μ\Delta u=\mu, where μ\mu is a Radon measure. It implies that the blow up limits of solutions are homogenous functions of degree one. The first formula is new even for classical Laplace operator. Our method of proof uses a careful application of the strong maximum principle.

Keywords

Cite

@article{arxiv.2504.01178,
  title  = {A monotonicity formula for a classical free boundary problem},
  author = {Aram Karakhanyan},
  journal= {arXiv preprint arXiv:2504.01178},
  year   = {2025}
}
R2 v1 2026-06-28T22:43:02.280Z