Deriving exact prepotential for $N = 2$ supersymmetric Yang-Mills   theories from superconformal anomaly with rank two gauge groups
  The exact prepotential for $N = 2$ supersymmetric Yang-Mills theory is derived from the superconformal anomalous Ward identity for the gauge group SU(2) and SU(3) which can be generalized to any other rank two gauge group. 
Satchidananda Naik