Four-Graviton Scattering and Closed String Field Theory Event Date: 2018-05-25 admin Particle/String/Cosmology Speaker: Prof. Taejin Lee (Kangwon National University) / Host: Prof. Chao-Qiang Geng (NCTS/NTHU) Place: Lobby of NCTS, 5F, 3rd General Building, Nat'l Tsing Hua Univ.