From mboxrd@z Thu Jan 1 00:00:00 1970 X-Msuck: nntp://news.gmane.io/gmane.science.mathematics.categories/10732 Path: news.gmane.io!.POSTED.blaine.gmane.org!not-for-mail From: =?iso-8859-1?Q?Joyal=2C_Andr=E9?= Newsgroups: gmane.science.mathematics.categories Subject: Re: Pieter Hofstra Date: Wed, 4 May 2022 16:57:16 +0000 Message-ID: References: Reply-To: =?iso-8859-1?Q?Joyal=2C_Andr=E9?= Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Injection-Info: ciao.gmane.io; posting-host="blaine.gmane.org:116.202.254.214"; logging-data="1882"; mail-complaints-to="usenet@ciao.gmane.io" Cc: "categories@mta.ca" To: Philip Scott , JS PL Original-X-From: majordomo@rr.mta.ca Thu May 05 02:31:14 2022 Return-path: Envelope-to: gsmc-categories@m.gmane-mx.org Original-Received: from smtp2.mta.ca ([198.164.44.40]) by ciao.gmane.io with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.92) (envelope-from ) id 1nmPOk-0000GF-Oz for gsmc-categories@m.gmane-mx.org; Thu, 05 May 2022 02:31:14 +0200 Original-Received: from rr.mta.ca ([198.164.44.159]:59006) by smtp2.mta.ca with esmtp (Exim 4.80) (envelope-from ) id 1nmPN4-0005g4-Fz; Wed, 04 May 2022 21:29:30 -0300 Original-Received: from majordomo by rr.mta.ca with local (Exim 4.92.1) (envelope-from ) id 1nmPMi-0008AD-CX for categories-list@rr.mta.ca; Wed, 04 May 2022 21:29:08 -0300 In-Reply-To: Accept-Language: fr-CA, en-US Content-Language: fr-CA Precedence: bulk Xref: news.gmane.io gmane.science.mathematics.categories:10732 Archived-At: Dear Philip, I am saddened and surprised to learn that Pieter Hoftras passed away. It is unfair, he was still young! He was a warm person and a talented mathematician! His work combines geometric thinking with formal logic. It is a great loss for the community of category theorists. It was always a great pleasure to discuss with him. My sincerere condolences to his family and friends. Best regards, Andr=E9 On Wed, 4 May 2022 at 04:46, Philip Scott wrote: > It is with great sadness that we announce that our dear friend and > colleague Pieter Hofstra (1975-2022) passed away unexpectedly on May 1. > Pieter obtained his PhD from Utrecht University, under Jaap van Oosten, > studying realizability toposes. His research interests included general > topos theory, realizability, inverse semigroups and groupoids, abstract > computability, and homotopy type theory. Among his recent works, with J. > Funk he introduced the notion of isotropy groups of toposes, which he was > actively developing with students and colleagues. > > While Pieter was a brilliant researcher, a kind teacher and a caring > supervisor, we will most remember him as a friend. When we have any > details for a memorial service, we will pass them along. > > Richard Blute, Simon Henry, Philip Scott (University of Ottawa) > [For admin and other information see: http://www.mta.ca/~cat-dist/ ]