报告人：Qimin Zhang（蔚蓝海岸大学）
时间：2026年7月21日14:30-15:30
地点：物质科研楼C1124
In this talk, I will discuss my recent results concerning the positivity of tangent bundles of degree 4 weak Del Pezzo surfaces. Let S denote such a surface, I show that its tangent bundle T_S is almost nef. In addition, I willl also provide a classification of conic bundle structures on a given weak Del Pezzo surface. The total dual VMRT divisors associated to these conic bundle structures form the central technical tool to verify the almost nefness of T_S.
