Time-analyticity of solutions to the Ricci flow

Abstract

In this paper, we prove that if $g(t)$ is a smooth, complete solution to the Ricci flow of uniformly bounded curvature on $M\times [0,\Omega ]$, then the correspondence $t\mapsto g(t)$ is real-analytic at each $t_0\in (0,\Omega )$. The analyticity is a consequence of classical Bernstein-type estimates on the temporal and spatial derivatives of the curvature tensor, which we further use to show that, under the above global hypotheses, for any $x_0\in M$ and $t_0\in (0,\Omega )$, there exist local coordinates $x=x^i$ on a neighborhood $U\subset M$ of $x_0$ in which the representation $g_{ij}(x,t)$ of the metric is real-analytic in both $x$ and $t$ on some cylinder $U\times (t_0-\epsilon ,t_0+\epsilon )$.

34 pages; v2: some typos corrected

References in corpus (1)

• An energy approach to the problem of uniqueness for the Ricci flow

Cited by in corpus (1)

• A family of parameter-dependent diffeomorphisms acting on function spaces over a Riemannian manifold and applications to geometric flows