Three Dimensional Simplicial Yang-Mills Theory: An Approach to the Mass   Gap
  We show how to formulate Yang-Mills Theory in \m{2+1} dimensions as a hamitonian system within a simplicial regularization and construct its quantization, with special attention to the mass gap. An approximate conformal invariance of the hamiltonian of this theory is useful to construct a continuum limit. 
S. G. Rajeev