Seminars and Talks 14:00 - 16:00, December 10, 2020 (Thursday) Room 408, College of Science, NUK Effective Closed Systems on Groups (II) 16:00 - 17:00, December 10, 2020 (Thursday) broadcast in Room 515, Cosmology Bldg., NTU, Online seminar Flat and Rectifiable G Chains in Metric Space