From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/448 Path: news.gmane.org!not-for-mail From: categories Newsgroups: gmane.science.mathematics.categories Subject: My posting Date: Fri, 1 Aug 1997 14:48:43 -0300 (ADT) Message-ID: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-Trace: ger.gmane.org 1241016973 25821 80.91.229.2 (29 Apr 2009 14:56:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 14:56:13 +0000 (UTC) To: categories Original-X-From: cat-dist Fri Aug 1 14:49:37 1997 Original-Received: by mailserv.mta.ca; id AA21329; Fri, 1 Aug 1997 14:48:43 -0300 Original-Lines: 15 Xref: news.gmane.org gmane.science.mathematics.categories:448 Archived-At: Date: Thu, 31 Jul 1997 21:33:58 -0400 From: Michael Barr I regret that my recent posting on Pratt's construction should not have been sent to categories. He sent me privately a construction showing that A -o A has at least 2^K dinatural endomorphisms (that is the diagonalization of the functor that takes A,B to A -o B) in chu(Set,K) and I mistakenly thought it had come off the categories bulletin board. But it had been sent to me privately. In any case, the claim is correct and my description for K = 2 is too. Sorry for the mixup. Michael