Seminars and Talks 11:00 - 12:30, September 20, 2018 (Thursday) R638, Astronomy-Mathematics Building, NTU Formality Theorem for Differential Graded Manifolds 14:00 - 15:00, September 20, 2018 (Thursday) R201, Astronomy-Mathematics Building, NTU Some Recent Progress on Estimates of Singular Integrals