Dear Categories: Sad to think Albrecht Dold has passed away. I met him when I was a graduate student in Princeton from Fall 1955 to Spring 1958. I remember a gentle and kind person with a twinkle in the eye and a wry, lively sense of humor. Everyone liked him, and he was much in Fine Hall around Steenrod. There were many visitors in that period: Hirzebruch, Serre, Kan, Ioan James, to name a few, and Artin, Moore, Milnor, Spenser/Kodaira were very active. It was a great time to visit Princeton, and his career really took off from that period. Here is some information I found about him on the internet: Born: August 5, 1928, Triberg, Germany Died: September 26, 2011, Neckargemünd, Germany Education: 1948 - 1954 Studies of Mathematics, Physics and Astronomy, University of Heidelberg 1954 Ph.D., University of Heidelberg "Über fasernweise Homotopieäquivalenz von Faserräumen" under Herbert Seifert 1958 Habilitation, University of Heidelberg (Title not found.) Positions: 1954 - 1956 Assistant, Institute of Mathematics, University of Heidelberg 1956 - 1958 Assistant, Institute for Advanced Study, Princeton, NJ 1958 - 1960 Lecturer, Institute of Mathematics, University of Heidelberg 1960 - 1962 Professor, Columbia University, New York 1962 - 1963 Full Professor, University of Zürich 1963 - 1996 Full Professor, University of Heidelberg 1984 - 1985 Präsident der Deutschen Mathematiker-Vereinigung 1991 - 1994 Sekretär der Mathematisch-naturwissenschaftlichen Klasse der Heidelberger Akademie 1995 - 1998 Vice-President, International Mathematical Union Career: Albrecht Dold was born on August 5, 1928 in Triberg (Black Forest), Germany. He studied mathematics and physics at the University of Heidelberg, then worked for some years at the Institute for Advanced Study in Princeton, at Columbia University, New York and at the University of Zürich. In 1963 he returned to Heidelberg, where he has stayed since, declining several offers to attractive positions elsewhere. A. Dold's seminal work in algebraic topology has brought him international recognition beyond the world of mathematics itself. In particular, his work on fixed-point theory has made his a household name in economics, and his book "Lectures on Algebraic Topology" a standard reference among economists as well as mathematicians. He had 19 students and 58 descendants. He was a student of Herbert Seifert, who had 6 students and 205 descendants. Seifert's first dissertation, "Konstruktion dreidimensionaler geschlossener Räume", was done under Threlfall in Dresden, 1930. His second thesis, "Topologie dreidimensionaler gefaserter Räume", was done under van der Waerden, Leipzig,1932. There is an interesting Wikipedia page on him, but the one on Dold is not filled out. Seifert became a friend and long-term collaborator of Threlfall, and their book is well known. A co-student of Seifert's and a long-standing friend and collaborator with Dold was Dieter Puppe, whose dissertation, "Zur Homotopie von Abbildungen eines Polyeders, was also finished in 1954. He had 17 students and 93 descendants, but he died from a brain tumor already in 2005. Dold is survived by his wife, Dr. Yvonne Dold-Samplonius, a distinguished historian of mathematics. She was born in Haarlem, The Netherlands, in 1937, they were married in 1965, and she submitted her thesis, "Book of Assumptions by Aqatun", in 1977 in Amsterdam. [For admin and other information see: http://www.mta.ca/~cat-dist/ ]