We review the construction of the twisted partition functions of N=4 supersymmetric gauge theories, and we verify that their most infrared-divergent part transforms consistently with S-duality.
Bibliographical noteFunding Information:
L.G. is supported in part by the Ministero dell' Universit£ e della Ricerea Seientifiea e Tecnolog-ica, by INFN and by ECC, contracts SCI-CT92-0789 and CHRX-CT92-0035. A.G. is supported in part by BSF - American-Israel Bi-National Science Foundation, by the BRF - the Basic Research Foundation and by an Alon fellowship. M.P. is supported in part by NSF under grant no. PHY-9318171. A.Z. is supported in part by E.,C, Project ERBCHGCTT93073, SCI-CT93-0340, CHRX-CT93-0340.