Quadratic lifespan for the sublinear $\alpha$-SQG sharp front problem

Riccardo Montalto, Federico Murgante, Stefano Scrobogna

In this paper we consider the generalized surface quasi-geostrophic $\alpha$-SQG equations, in the "sublinear regime" $\alpha \in (0,1)$ and we study the stability of vortex patches close to…