演講公告
新聞標題： ( 2015-05-20 )
演講主題：Minimal genus problems for 4-manifolds
主講人：何忠益 博士(清華大學 數學系)
演講日期：2015年5月26日(星期二) 下午2:00 – 3:00
演講地點：(光復校區) 科學一館223室
茶會時間：當天下午1:30 (科學一館205室)
摘要內容：
The minimal genus problem is one of the main theme in low dimensional topology. It was studied by Wall, Minlor, Rokhlin, Thom and many mathematicians in 50s. For instance, the Thom conjecture states that a smooth algebraic in CP^2 has minimal genus within its homology class. It was first proved by Kronheimer and Mrowka using Seiberg-Witten invariant in 1994. Using similar technique, we generalize the result and provide lower bound of the genus of embedded smooth surfaces which depends only on the intersection forms and the (co)homology classes but not on the smooth structure. In this talk, I will introduce this problem and the results from classical to modern eras.相關檔案：Talk_1040526.doc
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