We will have the 19th online colloquium “Extreme Universe Colloquium” on October 2nd (Mon) 22:00 (JST). The speaker is Prof. Brian Swingle (Brandeis University). For details, please refer to the poster. If you have not registered yet, please register at our online event website at least three days prior to the colloquium. (It is not necessary to register again if you have done it already.)