Year: 2026
Type: preprint
Abstract: We study exponentially harmonic functions on complete Riemannian manifolds. Under a lower Ricci curvature bound \(\Ric_g\geq-Kg\), we first establish a local gradient estimate in terms of the oscillation. We then prove a pointwise gradient estimate for solutions bounded from one side. As an application, when \(\Ric_g\geq0\), we obtain a Liouville theorem under a one-sided sublinear growth condition. In particular, every exponentially harmonic function bounded above or below is constant.
Source: arXiv (Cornell University)
Authors: Jin, Xishen, Zhang, Xi
Language: English
Subfield: Applied Mathematics
Field: Mathematics
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223893574