2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/45425We show why and how the $I\bar I$ valley trajectory commonly used in the literature so far is in fact unsatisfactory. A better $I\bar I$ valley is suggested. We also give analytic expressions for the multiple instanton-antiinstanton configurations in the pure Yang-Mills theory. These formulas make it possible to go beyond the dilute gas approximation and calculate the multi-body interactions among instantons and antiinstantons.22 pages, harvmac, no figuresHigh Energy Physics - Phenomenologytext