The transformer that provides electricity to the AMS building in Providence went down on Sunday, April 22. The restoration of our email, website, AMS Bookstore and other systems is almost complete. We are currently running on a generator but overnight a new transformer should be hooked up and (fingers crossed) we should be fine by 8:00 (EDT) Wednesday morning. This issue has affected selected phones, which should be repaired by the end of today. No email was lost, although the accumulated messages are only just now being delivered so you should expect some delay.
Thanks for your patience.
"Maths proves Tetris is tough," by Helen Pearson. Nature ScienceUpdate, 28 October 2002.
Those who have trouble solving Tetris can take heart in the fact that ErikDemaine and two other colleagues have shown that the problem of playing Tetrisefficiently is NP-complete. Tetris is a popular computer game involving fittingpieces -- made up of four squares -- that drop from the top of the screen intoopenings in rows. It may sound easy, but Demaine and his colleagues have nowconfirmed that it is not. Pearson points out that other games, like chess andGo, are even harder.
--- Mike Breen