From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/4661 Path: news.gmane.org!not-for-mail From: Ross Street Newsgroups: gmane.science.mathematics.categories Subject: Re: Matrices Category Date: Thu, 16 Oct 2008 16:05:32 +1100 Message-ID: NNTP-Posting-Host: main.gmane.org Mime-Version: 1.0 (Apple Message framework v753.1) Content-Transfer-Encoding: 7bit X-Trace: ger.gmane.org 1241020088 14271 80.91.229.2 (29 Apr 2009 15:48:08 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Wed, 29 Apr 2009 15:48:08 +0000 (UTC) To: Categories Original-X-From: rrosebru@mta.ca Thu Oct 16 08:49:54 2008 -0300 Return-path: Envelope-to: categories-list@mta.ca Delivery-date: Thu, 16 Oct 2008 08:49:54 -0300 Original-Received: from Majordom by mailserv.mta.ca with local (Exim 4.61) (envelope-from ) id 1KqRHO-0003vG-1U for categories-list@mta.ca; Thu, 16 Oct 2008 08:44:34 -0300 Original-Sender: cat-dist@mta.ca Precedence: bulk X-Keywords: X-UID: 18 Original-Lines: 30 Xref: news.gmane.org gmane.science.mathematics.categories:4661 Archived-At: "Hugo Macedo" wrote: > I'm trying to study the Category of Matrices but I found almost > nothing. Do > you know where I can find information about them? Once upon a time I handwrote some incomplete notes on "skeletal" representation theory which started out looking at Mat (a skeleton of Vect) as a monoidal category with direct sums (the tensor product is Kronecker product of matrices). I tried to strictify as much as possible all the associativity, distributivity, . . constraints. I typed it at some point. The pdf file has some funny things (notably copyright signs!) in it but it has been on the web (linked from my Publications page) for quite awhile. Maybe it is the kind of thing Hugo has in mind. But remember, it is sort of "in progress"; no jokes please about "droup" which is meant as short for "dual group"! Ross