Algebraic Geometry SeminarOrganizers：Caucher Birkar，贾甲Speaker：Hao Zhang (University of Glasgow)Time：Fri., 15:30-16:30 , Mar. 20, 2026Venue：B725, Shuangqing Complex Building AOnline：Zoom Meeting ID: 262 865 5007Passcode: YMSCTitle：Contraction Algebras and Gopakumar--Vafa InvariantsAbstract:We study the birational geometry of cAn singularities and their curve-counting invariants via nonc...
YMSC Topology SeminarOrganizers：陈伟彦、高鸿灏、黄意、林剑锋、孙巍峰Speaker：Binbin XU 徐彬斌 (Nankai)Time：Mon., 10:00-11:00 am, Mar.17, 2025Venue：B725, Shuangqing Complex Building AOnline：Zoom Meeting ID: 405 416 0815Password: 111111Title:Length orders of curves on hyperbolic surfacesAbstract：Let S be an oriented topological surface of finite type. Given a hyperbolic metric on S, there is...
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