Golden Gopher freshman wrestler Cory Cooperman has decided to transfer from the University of Minnesota to Lehigh University.    Cooperman, a native of Springfield, N.J., was a four-time National Prep champ, a Junior National Freestyle runner-up and a two-time High School All-American at Blair Academy.  He was rated as the 17th-best recruit in the nation by InterMat. Cooperman was projected to compete at 125 pounds, but had not wrestled this season at Minnesota.