From rote@zedat.fu-berlin.de Thu Nov 23 10:43:26 2023 Received: from outpost1.zedat.fu-berlin.de ([130.133.4.66]) by list1.zedat.fu-berlin.de (Exim 4.95) for facets-of-complexity@lists.fu-berlin.de with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 (envelope-from ) id 1r66F3-002EdH-RY; Thu, 23 Nov 2023 10:43:25 +0100 Received: from inpost2.zedat.fu-berlin.de ([130.133.4.69]) by outpost.zedat.fu-berlin.de (Exim 4.95) for facets-of-complexity@lists.fu-berlin.de with esmtps (TLS1.3) tls TLS_AES_256_GCM_SHA384 (envelope-from ) id 1r66F3-001TWi-Ox; Thu, 23 Nov 2023 10:43:25 +0100 Received: from i59f7abf8.versanet.de ([89.247.171.248] helo=[192.168.178.20]) by inpost2.zedat.fu-berlin.de (Exim 4.95) for facets-of-complexity@lists.fu-berlin.de with esmtpsa (TLS1.3) tls TLS_AES_128_GCM_SHA256 (envelope-from ) id 1r66F3-001IhZ-J7; Thu, 23 Nov 2023 10:43:25 +0100 Message-ID: <73a7c121-c881-44cb-930f-0755f07f0f8a@inf.fu-berlin.de> Date: Thu, 23 Nov 2023 10:43:25 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird To: facets-of-complexity@lists.fu-berlin.de Content-Language: en-US From: =?UTF-8?Q?G=C3=BCnter_Rote?= Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit X-Original-Sender: rote@inf.fu-berlin.de X-Originating-IP: 89.247.171.248 X-ZEDAT-Hint: PO X-purgate: clean X-purgate-type: clean X-purgate-ID: 151147::1700732605-DF98DCDE-16D27BC9/0/0 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 X-Spam-Flag: NO X-Spam-Status: No, score=-50.0 required=5.0 tests=ALL_TRUSTED, T_SCC_BODY_TEXT_LINE X-Spam-Checker-Version: SpamAssassin 3.4.6 on Palau.ZEDAT.FU-Berlin.DE X-Spam-Level: Subject: [Facets-of-complexity] talk by Daniel Huson on periodic tilings, Friday Nov. 23 in Potsdam/Golm X-BeenThere: facets-of-complexity@lists.fu-berlin.de X-Mailman-Version: 2.1.29 Precedence: list List-Id: announcements of Monday lectures and other events List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 23 Nov 2023 09:43:26 -0000 Dear Facets! Tomorrow there will be a lecture that might be interesting to some of us. (Beware: it is in Golm behind Potsdam; it takes a while to get there.) On 24.11, at 10:00 am, there will be a talk by Prof. Daniel Huson, University of Tübingen: A galaxy of periodic tilings This talk has four parts. In the first part - topology -, we recall the classification of two dimensions manifolds and orbifolds, and introduce their Conway notation. In the second part - geometry -, we discuss two-dimensional periodic tilings and their classification. In the third part - combinatorics -, we introduce Delaney-Dress symbols and indicate how they can be used to systematically enumerate periodic tilings. Finally, in the fourth part - algorithms and software -, we present Tegula (http://tegula.husonlab.org), a new computer program that can be used the explore the “galaxy” of all 2.4 billion periodic tilings of the euclidean plane, sphere and hyperbolic plane, of low Dress-complexity. This is joint work with Olaf Delgado and Rüdiger Zeller. It will take place in House 9 of the Golm Campus at the University of Potsdam. Room 1.22 ******** Prof. Dr. Myfanwy E. Evans Applied Geometry and Topology Institute for Mathematics, University of Potsdam The fastest connection from Berlin is the train RB23 through Berlin Zoologischer Garten via Wannsee to Potsdam, Golm Bhf. There is also RB21 from Potsdam Hauptbahnhof to Potsdam, Golm Bhf.