“…In 1914, Bernstein proved that the only entire minimal graph in R 3 is a plane. This result was generalized to R m+1 for m ≤ 7, and higher dimensions and codimensions under various growth conditions, see [EH], [SXW], [Wa3] and their references. In 1965, Chern [Ch] showed that the only entire graphic hypersurface in R m+1 with constant mean curvature must be minimal.…”