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Author: P. Berglund, P. Mayr

Title: On F-Theory/Heterotic Duality

Abstract: Using local mirror symmetry in type IIA string compactificationson Calabi--Yau $n+1$ folds $X_{n+1}$ we construct vector bundleson (possibly singular) elliptically fibered Calabi--Yau $n$-folds$Z_n$. As an application we findnon-perturbative gauge enhancements of the heterotic string on singularCalabi--Yau manifolds and new non-perturbative dualities relatingheterotic compactifications on different manifolds.

Comments: 7 pages, Revtex. Talk given by P. Berglund at DPF'99.Report-no: NSF-ITP-99-13


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