An Approach to ${\cal N}=4$ ADE Gauge Theory on K3
  We propose a recipe for determination of the partition function of ${\cal N}=4$ $ADE$ gauge theory on $K3$ by generalizing our previous results of the SU(N) case. The resulting partition function satisfies Montonen-Olive duality for $ADE $ gauge group. 
Masao Jinzenji (Univ. of Hokkaido, Math. Dept.), Toru Sasaki (Univ. of   Hokkaido, Phys. Dept.)