Wellposedness and singularity formation beyond the Yudovich class
Analysis of PDEs
2024-01-01 v1
Abstract
We introduce a local-in-time existence and uniqueness class for solutions to the 2d Euler equation with unbounded vorticity. Furthermore, we show that solutions belonging to this class can develop stronger singularities in finite time, meaning that they experience finite time blow up and exit the wellposedness class. Such solutions may be continued as weak solutions (potentially non-uniquely) after the singularity. While the general dynamics of 2d Euler solutions beyond the Yudovich class will certainly not be so tame, studying such solutions gives a way to study singular phenomena in a more controlled setting.
Cite
@article{arxiv.2312.17610,
title = {Wellposedness and singularity formation beyond the Yudovich class},
author = {Tarek M. Elgindi and Ryan W. Murray and Ayman R. Said},
journal= {arXiv preprint arXiv:2312.17610},
year = {2024}
}