Seminars and Talks 14:00 - 15:00, November 23, 2018 (Friday) R440, Astronomy-Mathematics Building, NTU Introducing Differential Graded Categories 14:10 - 16:00, November 23, 2018 (Friday) Lecture Room B, 4th Floor, The 3rd General Building, NTHU Transition Fronts for Periodic Bistable Reaction-diffusion Equations