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math.AG2026
Birational cubic fourfolds via an Enriques Cremona transformation
Corey Brooke, Lisa Marquand
We describe a Cremona transformation on given by the linear system of quintics that are double along the Fano model of an Enriques surface . Using this Cremona tr…
math.AG2026
Cubic fourfolds containing highly singular hyperplane sections
Lisa Marquand, Sasha Viktorova
We construct five irreducible divisors in the moduli space of complex cubic fourfolds parametrising smooth cubic fourfolds that contain highly singular hyperplane sections. We prov…