2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/55888We explore a relation between four-dimensional N=2 heterotic vacua induced by Mirror Symmetry via Heterotic/Type II duality. It allows us to compute the α' corrections to the hypermultiplet moduli space of heterotic compactifications on K3xT^2 in the limit of large base of the elliptic K3. We concentrate on the case of point-like instantons on orbifold singularities leading to low-dimensional hypermultiplet moduli spaces.17 pages, plain Tex; error corrected, references addedHigh Energy Physics - Theorytext