From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/9956 Path: news.gmane.org!.POSTED.blaine.gmane.org!not-for-mail From: =?UTF-8?Q?Andr=c3=a9e_Ehresmann?= Newsgroups: gmane.science.mathematics.categories Subject: Re: "First" use of 'Category theory' to describe our field Date: Mon, 15 Jul 2019 20:16:52 +0200 Message-ID: Reply-To: =?UTF-8?Q?Andr=c3=a9e_Ehresmann?= Mime-Version: 1.0 Content-Type: text/plain; charset="utf-8"; format=flowed Content-Transfer-Encoding: 8bit Injection-Info: blaine.gmane.org; posting-host="blaine.gmane.org:195.159.176.226"; logging-data="101376"; mail-complaints-to="usenet@blaine.gmane.org" To: Categories Original-X-From: majordomo@mlist.mta.ca Wed Jul 17 02:09:20 2019 Return-path: Envelope-to: gsmc-categories@m.gmane.org Original-Received: from smtp2.mta.ca ([198.164.44.55]) by blaine.gmane.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.89) (envelope-from ) id 1hnXVW-000QDB-OV for gsmc-categories@m.gmane.org; Wed, 17 Jul 2019 02:09:18 +0200 Original-Received: from mlist.mta.ca ([138.73.1.63]:35185) by smtp2.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1hnXVG-00076G-28; Tue, 16 Jul 2019 21:09:02 -0300 Original-Received: from majordomo by mlist.mta.ca with local (Exim 4.71) (envelope-from ) id 1hnXUT-0005nY-H6 for categories-list@mlist.mta.ca; Tue, 16 Jul 2019 21:08:13 -0300 Content-Language: en-GB Precedence: bulk Xref: news.gmane.org gmane.science.mathematics.categories:9956 Archived-At: Though Charles Ehresmann had extensively used the notion of groupoids (taken from Brandt, 1926) from his 1950 paper on connections?? up, the first paper where he explicitly used categories is "Gattungen von lokalen Strukturen (Jahresb. d. Deutschen Math.1957) which is at the basis of many of his and my later works From 1963 on, he published abstracts of his articles on category theory (e.g. on'structured' or 'internal' categories),in a series of "Notes aux Comptes-Rendus de l'Acad??mie des Sciences" and they were classified in the Section "Alg??bre Homologique". At that time, he asked if if was not possible to create a new more adapted Section called "Th??orie des Cat??gories", but it was refused. It is only in 1966 that the Acad??mie created a Section called "Alg??bre des cat??gories" (which contained his last Notes). (For references, cf. his "Oeuvres Compl??tes et Comment??es" freely downloadable on https://ehres.pagesperso-orange.fr/C.E.WORKS_fichiers/C.E_Works.htm .) Kind regards Andree [For admin and other information see: http://www.mta.ca/~cat-dist/ ]