3 papers
hep-th2026
Chiral global embedding of Fibre Inflation with uplift
Michele Cicoli, Antonella Grassi, Osmin Lacombe +1
We carefully analyse the challenges posed by the construction of type IIB chiral global embeddings of Fibre Inflation with uplift to a de Sitter vacuum. We pre…
math.AG2026
Bounds on the Mordell-Weil rank of elliptic fibrations
Antonella Grassi, Rick Miranda, Kapil Paranjape +2
We present two proofs for a bound on the rank of the Mordell-Weil group of some elliptic fibrations. The bounds apply to Calabi-Yau varieties, which are also of interest to the phy…
math.AG2026
Rational elliptic surfaces with six singular double fibres
Ciro Ciliberto, Antonella Grassi, Rick Miranda +2
A rational elliptic surface with section is a smooth, rational, complex, projective surface that admits a relatively minimal fibration $f: \mathcal{X}\longrightarrow…