Seminars and Talks 10:00 - 11:00, October 2, 2019 (Wednesday) R440, Astronomy-Mathematics Building, NTU Multidimensional Persistence Diagrams via (co)sheaf Theory--Sheaves and Cosheaves 11:00 - 12:30, October 2, 2019 (Wednesday) R638, Astronomy-Mathematics Building, NTU Stochastic Processes in Random Media