Gómez, CésarHernández Redondo, RafaelLópez, Esperanza2023-06-202023-06-201996-10-030370-269310.1016/0370-2693(96)00912-4https://hdl.handle.net/20.500.14352/60227© 1996 Elsevier Science B.V. This work is partially supported under grant by European Community grant ERBCHRXCT920069, by PB92-1092. The work of E. L. is supported by M. E. C. fellowship. The work of R. H. is supported by U.A.M. fellowship.The action of the S-duality Sl(2,Z) group on the moduli of the Calabi-Yau manifold WIP^(12)_(11226) appearing in the rank two dual pair (K3 × T 2/WIP^(12)_(11226)) is defined by interpreting the N = 4 to N = 2 flow, for SU(2) supersymmetric YangMills, in terms of the Calabi-Yau moduli. The different singularity loci are mapped in a one to one way, and the (N = 2 limit/point particle limit) is obtained in both cases by the same type of blow up. Moreover, it is shown that the S-duality group permutes the different singularity loci of the moduli of WIP^(12)_(11226). We study the transformation under S-duality of the Calabi-Yau Yukawa couplings.engjournal articlehttp://dx.doi.org/10.1016/0370-2693(96)00912-4http://www.sciencedirect.comhttps://arxiv.org/abs/hep-th/9512017v3open access53Física-Modelos matemáticos