Paper detail

The nonlocal mean curvature flow of periodic graphs

We establish the well-posedness of the nonlocal mean curvature flow of order ${α\in(0,1)}$ for periodic graphs on $\mathbb{R}^n$ in all subcritical little Hölder spaces ${\rm h}^{1+β}(\mathbb{T}^n)$ with $β\in(0,1)$. Furthermore, we prove that if the solution is initially sufficiently close to its integral mean in ${\rm h}^{1+β}(\mathbb{T}^n)$, then it exists globally in time and converges exponentially fast towards a constant. The proofs rely on the reformulation of the equation as a quasilinear evolution problem, which is shown to be of parabolic type by a direct localization approach, and on abstract parabolic theories for such problems.