Shengzhen Ning

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20222026

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math.SG2025

Cohomologous symplectic forms with different Gromov widths

Shengzhen Ning

We study McDuff-Salamon's Problem 46 by showing that there exist closed manifolds of dimension $\geq 6$ admitting cohomologous symplectic forms with different Gromov widths. The ex…

math.SG2025

Symplectic log Kodaira dimension $- \infty$ , affine-ruledness and unicuspidal rational curves

Tian-Jun Li, Shengzhen Ning

Given a closed symplectic $4$ -manifold $(X, ω)$ , a collection $D$ of embedded symplectic submanifolds satisfying certain normal crossing conditions is called a symplectic divisor. I…

Cohomologous symplectic forms with different Gromov widths

Symplectic log Kodaira dimension −∞, affine-ruledness and unicuspidal rational curves

Symplectic log Kodaira dimension $- \infty$ , affine-ruledness and unicuspidal rational curves