  An $hp$-version error analysis is developed for the general DG method in
mixed formulation for solving the linear elastic problem. First of all, we give
the $hp$-version error estimates of two $L^2$ projection operators. Then
incorporated with the techniques in [11], we obtain the $hp$-version error
estimates in energy norm and $L^2$ norm. Some numerical experiments are
provided for demonstrating the theoretical results.
