Berlin-Hamburg-Hannover-Seminar am 10.07.2026

Laurent Coté (Bonn) tba

Kai Cieliebak (Augsburg) Symplectic quadrics in projective 3-space

A well-studied and intriguing question concerns the relation between symplectic and algebraic surfaces in the projective plane. In ongoing work with Zhengyi Zhou we address this question one dimension higher. In particular, we prove that each degree two symplectic hypersurface in complex projective space P³ is symplectomorphic to P¹x P¹ with its standard structure. The proof uses the moduli space of nodal rational curves of degree two.