  In the present paper, we introduce a concept of Ricci curvature on
hypergraphs for a nonlinear Laplacian. We prove that our definition of the
Ricci curvature is a generalization of Lin-Lu-Yau coarse Ricci curvature for
graphs to hypergraphs. We also show a lower bound of nonzero eigenvalues of
Laplacian, gradient estimate of heat flow, and diameter bound of Bonnet-Myers
type for our curvature notion. This research leads to understanding how
nonlinearity of Laplacian causes complexity of curvatures.
