I just saw this very nice memorial article for Alan Durfee published in the Notices of the American Mathematical Society. https://www.ams.org/journals/notices/202504/noti3149/noti3149.html Alison -------------- next part -------------- An HTML attachment was scrubbed... URL: <http://cosmos.phy.tufts.edu/mhonarc/boston-change-ringers/attachments/20250320/b152e60b/attachment.htm>