From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/1633 Path: news.gmane.org!not-for-mail From: Michael Barr Newsgroups: gmane.science.mathematics.categories Subject: Dave Harrison Date: Tue, 19 Sep 2000 11:58:44 -0400 (EDT) Message-ID: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Trace: ger.gmane.org 1241017981 32156 80.91.229.2 (29 Apr 2009 15:13:01 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:13:01 +0000 (UTC) To: Categories list Original-X-From: rrosebru@mta.ca Tue Sep 19 17:19:37 2000 -0300 Original-Received: (from Majordom@localhost) by mailserv.mta.ca (8.9.3/8.9.3) id QAA04087 for categories-list; Tue, 19 Sep 2000 16:09:20 -0300 (ADT) X-Authentication-Warning: triples.math.mcgill.ca: barr owned process doing -bs X-Sender: barr@triples.math.mcgill.ca Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 19 Original-Lines: 20 Xref: news.gmane.org gmane.science.mathematics.categories:1633 Archived-At: I have just received from Ann Harrison the sad news that Dave died last Dec. 21. I suspect that most of the younger practitioners of category theory are not aware of Dave's contributions to the subject. Not in the sense of having actively worked on it, but of having encouraged it in the very early days. When he came to Penn he taught a course in homological algebra that used categories extensively. In point of fact, I had never heard of a category before taking that course. Then he was one of the main organizers of the La Jolla conference in 1965 that was the first ever major international conference in categories. (The first conference that I am aware of was the midwest category meeting that Saunders Mac Lane organized in April (I think) of the same year, a few months earlier. But the participants consisted only of a handful of people from Urbana and Chicago.) For anyone who wishes to write Ann, her address is 12 Striper Lane, Chatham, MA 02633. Michael