Time analyticity for the parabolic type Schrödinger equation on Riemannian manifold with integral Ricci curvature condition (Q6175783)

On a complete Riemannian manifold with integral Ricci curvature condition, the author states that a smooth solution of exponential growth of a suitable parabolic Schrödinger equation is analytic in the Cartesian product of a geodesic ball with a unit interval (Theorem 2.1).