J. Dorfmeister

collaborators

2 papers

math.SG2025

Symplectic Classes on Elliptic Surfaces with positive Euler Number

Josef G. Dorfmeister, Tian-Jun Li

A key question for $4$ -manifolds $M$ admitting symplectic structures is to determine which cohomology classes $α \in H^{2} (M, R)$ admit a symplectic representative. The collect…

math.SG2016

Bounded Negativity and Symplectic 4-Manifolds

Josef G. Dorfmeister

Let $(M, ω)$ be a symplectic 4-manifold of negative Kodaira dimension. Let $C$ be an $ω$ -symplectic curve, $J$ -holomorphic for some $J$ tamed by $ω$ . Then $[C]^{2}$ is bounded below b…