Birational cobordism invariance of uniruled symplectic manifolds

Jianxun Hu, Tian-Jun Li, Yongbin Ruan

A symplectic manifold $(M,\omega )$ is called {\em (symplectically) uniruled} if there is a nonzero genus zero GW invariant involving a point constraint. We prove that symplectic unirule…