Isoparametric functions on Finsler space forms

In this paper, we prove that transnormal functions are isoparametric functions on Finsler space forms $(N(c),F)$ under certain conditions, which generalize Theorem B given by Q.

M.

Wang in Riemannian case.

On forward Finsler space forms $(\overrightarrow{N}(c),F)$, we discuss the relationship between umbilic hypersurfaces and isoparametric hypersurfaces, and construct global and local isoparametric functions using the distance function.