2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54489A summary of results is presented, which provide exact description of the low-energy $4d$ $N=2$ and $N=4$ SUSY gauge theories in terms of $1d$ integrable systems.21 pages, talk given by A.M. in the conference `` Frontiers in Quantum Field Theory'' in honor of Professor Keiji Kikkawa's 60th birthdayHigh Energy Physics - Theorytext