We construct non-geometric compactifications using the F-theory dual of the heterotic string
compactified on a two-torus, together with a close connection between Siegel modular forms …

A bstract Eight-dimensional nongeometric heterotic strings were constructed as duals of F-
theory on Λ 1, 1⊕ E 8⊕ E 7 lattice polarized K3 surfaces by Malmendier and Morrison. We …

We describe explicit formulas relevant to the F-theory/heterotic string duality that reconstruct
from a specific Jacobian elliptic fibration on the Shioda–Inose surface covering a generic …

We study the family of K3 surfaces of Picard rank sixteen associated with the double cover of
the projective plane branched along the union of six lines, and the family of its Van Geemen …

A bstract We study the (1, 0) six-dimensional SCFTs living on defects of non-geometric
heterotic backgrounds (T-fects) preserving a E 7× E 8 subgroup of E 8× E 8. These …

The goal of the present paper is two-fold. First, we present a classification of algebraic K3
surfaces polarized by the lattice H⊕ E8⊕ E7. Key ingredients for this classification are as …

Eight-dimensional non-geometric heterotic strings with gauge algebra $\mathfrak {e}
_8\mathfrak {e} _7 $ were constructed by Malmendier and Morrison as heterotic duals of F …

In this work we study the duality between F-theory and the heterotic string beyond the stable
degeneration limit in F-theory and large fiber limit in the heterotic theory. Building upon a …

We construct non-geometric string compactifications by using the F-theory dual of the
heterotic string compactified on a two-torus with two Wilson line parameters, together with a …

In this paper we classify the elliptic fibrations on K3 surfaces which are the double cover of a
blow up of P2 branched along rational curves and we give equations for many of these …