Dear All, This is a reminder that the 83rd PSSL will take place in Glasgow one month from now, Sat 6th and Sun 7th May. Special attractions: * Jon Woolf will give an introduction to derived categories. In the last decade or so, derived categories have become very important in certain parts of geometry; they now seem to be a standard part of a modern algebraic geometer's toolkit. Jon's introduction will be tailored to category theorists, and won't assume any specialist knowledge. * (an attraction for most): thanks to a brand new law, all of Scotland's pubs, cafes, restaurants, bars, etc are now smoke-free. For information, including the current list of participants and talks, see http://www.maths.gla.ac.uk/~tl/pssl There's no pressing need to register, unless (a) you want to give a talk, or (b) you want to be in the same hotel as other participants. Best wishes, Tom Leinster Richard Steiner