Dold gave two courses in algebraic topology while I was a graduate student at Columbia, 1961-62 I think. They were really beautiful. Apart from Sammy's course on homological algebra, they were the only lectures I learned something from, I still have the notes. Albrecht Dold was a wonderful mathematician, and a very decent person. I think we will all miss him. Myles Tierney -----Original Message----- From: Joyal, André [mailto:joyal.andre@uqam.ca] Sent: Fri 10/7/2011 6:18 PM To: Andreas Blass; categories@mta.ca Subject: categories: RE : categories: Albrecht Dold, R.i.P. I have meet Dold only a couple of times. He always made a big impression on me. I remember very well his talk at the conference in honour of Samy Eilenberg in 1984. He spoke on a categorical formulation of Lefschetz fixed points theorem using S-duality and trace. It was a very beautiful mixture of category theory and topology. He received a standing ovation for his talk! He is one of my mathematical heros. AJ [For admin and other information see: http://www.mta.ca/~cat-dist/ ]