Dear colleagues, Some very sad news — Erik Palmgren passed away unexpectedly this week at his home in Stockholm, after a short period of bad health. Besides being insightful and influential in his own work, mostly on constructive mathematics and related topics in logic, Erik was also a generous and sensitive mentor to many students and younger colleagues, first in Uppsala and then in Stockholm. He will be deeply missed. Personal website: http://staff.math.su.se/palmgren/ For any academic business regarding Erik, please contact either me < p.l.lumsdaine@math.su.se> or Jonas Bergström <jonasb@math.su.se> (head of the Stockholm University mathematics division). Sadly, –Peter. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]