From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/1652 Path: news.gmane.org!not-for-mail From: Michael MAKKAI Newsgroups: gmane.science.mathematics.categories Subject: correction Date: Tue, 10 Oct 2000 11:52:22 -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 1241017995 32267 80.91.229.2 (29 Apr 2009 15:13:15 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:13:15 +0000 (UTC) To: categories@mta.ca Original-X-From: rrosebru@mta.ca Tue Oct 10 19:29:34 2000 -0300 Return-Path: Original-Received: (from Majordom@localhost) by mailserv.mta.ca (8.11.1/8.11.1) id e9ALo5g18091 for categories-list; Tue, 10 Oct 2000 18:50:05 -0300 (ADT) X-Authentication-Warning: mailserv.mta.ca: Majordom set sender to cat-dist@mta.ca using -f Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 10 Original-Lines: 17 Xref: news.gmane.org gmane.science.mathematics.categories:1652 Archived-At: This is a correction to the talk I gave in Toronto on the 24th of September. In the definition of "principal computad" (on page 8 of the slides, for those who have copies of the slides) a clause was omitted. The definition should read as follows (clause (c) was missing): The computad A is *principal* if (a) A is finite, (b) there is a unique indeterminate of maximal dimension in A, say x; and (c) there is no proper subcomputad of A containing x. I add that there was another error in the slides, although it was caught during the talk and corrected on the projected slide (but not on the copies). On page 11 of the slides, "fibration" should be "trivial fibration". Michael Makkai