2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/198008We consider generalized self-duality equations for U(2r) Yang-Mills theory on R^8 with quaternionic structure. We employ the extended ADHM method in eight dimensions to construct exact soliton solutions of the low-energy effective theory of the heterotic string.8 pages, LaTeX, no figuresHigh Energy Physics - Theorytext