  F.-H. Lin studied minimal graphs of the Dirichlet problem in the hyperbolic
space and proved that any such minimal graph has the same global regularity as
the boundary if the dimension of the minimal graph is even and that there is an
obstacle to the higher regularity if the dimension is odd. We discuss the odd
dimension case and study how the higher regularity is obstructed. We introduce
the logarithm of the distance to the boundary as an additional independent
self-variable and establish concise boundary regularity for the minimal graph.
