Seminars and Talks 10:00 - 11:30, December 1, 2017 (Friday) R440, Astronomy-Mathematics Building, NTU Homological Dimension 10:00 - 12:00, December 1, 2017 (Friday) R201, Astronomy-Mathematics Building, NTU Dimensional Analysis (III): Critial Exponent of Nonlinear PDE 15:00 - 16:15, December 1, 2017 (Friday) R609, Astronomy-Mathematics Building, NTU On Descents of the Valuation of Root Group Data (I)