Seminars and Talks 13:30 - 14:20, April 19, 2018 (Thursday) Lecture Room B, 4th Floor, The 3rd General Building, NTHU On Finiteness of 4-body Central Configurations 16:00 - 17:00, April 19, 2018 (Thursday) R440, Astronomy-Mathematics Building, NTU The Connected Sum of Manifolds with Positive Webster Curvature