Dates

Disputation Jorge Olarte

Location: Arnimallee 3, SR 119

Dec 05, 2019 | 04:00 PM

Einstein Workshop Polytopes and Algebraic Geometry 2019

This will be a three-day workshop with lectures, presentations and informal discussions on polytopes and their relations to algebraic geometry. It is funded by the Einstein Foundation Berlin , as part of Francisco Santos' Einstein Visiting Fellowship at FU Berlin for 2016-2020. It is one of the activities in the thematic Einstein semester Varieties Polyhedra and computations .

Dec 02, 2019 - Dec 04, 2019

Einstein Workshop Geometric and Topological Combinatorics

Location: Freie Universität Berlin, Königin Luise Straße 24/26, 14195 Berlin

Oct 29, 2018 - Oct 31, 2018

Encuentro Colombiano de Combinatoria ECCO 2018

Günter M. Ziegler (FU Berlin): „Polytopes — Extremal Examples and Combinatorial Parameters“

Location: Universidad del Norte, Barranquilla, Colombia

Jun 05, 2018 - Jun 16, 2018

Einstein Workshop Discrete Geometry and Topology

This will be a four day workshop with lectures, presentations and informal discussions on discrete geometry and topology, and related topics (combinatorial topology, computational geometry, polytope theory). It is primarily funded by the Einstein Foundation Berlin , as part of Francisco Santos' Einstein Visiting Fellowship at FU Berlin for 2016-2019. Additional funding is provided by the project  Discretization in Geometry and Dynamics  (SFB Transregio 109) and the  Berlin Mathematical School . Read more.

Location: Freie Universität Berlin

Mar 13, 2018 - Mar 16, 2018

Defense Lauri Loiskekoski

Location: Seminar Room Arnimallee 2 14195 Berlin

Dec 21, 2017 | 02:00 PM

Open-Acess-World-Café

Location: Freie Universität Berlin, Seminarzentrum, Raum: L 113 und L 116 (Erdgeschoss), Otto-von-Simson-Str. 26 (Silberlaube), 14195 Berlin

Oct 25, 2017 | 01:00 PM - 04:00 PM

ÖMG-DMV-Jahrestagung 2017

Location: Paris-Lodron University of Salzburg

Sep 11, 2017 - Sep 15, 2017
Aug 14, 2017 - Dec 15, 2017

Reading Group on Real Algebraic Geometry

Location: Max Planck Institute for Mathematics in the Sciences Inselstraße 22 04103 Leipzig Germany

Jul 03, 2017 - Jul 07, 2017

Conference on Applied Topology

Location: Banach Center, Będlewo, Polen

Jun 25, 2017 - Jul 01, 2017
Jun 24, 2017 | 05:00 PM - 11:59 PM

Discrete Geometry and Convexity - BÁRÁNY 70

Location: Renyi Institute of Mathematics, Budapest

Jun 19, 2017 - Jun 23, 2017

Defense Albert Haase

The square peg problem is at least 106 years old and still unsolved in full generality. It asks whether any simple closed curve in the plane inscribes a square. By “inscribes a square” we mean that the curve contains the four vertices of a square. The square itself may intersect both the bounded and unbounded components. Substantial progress on the problem has been made using methods from equivariant topology: Piecewise linear, analytic, convex, and locally monotone curves are all known to inscribe squares. We present a recent positive result by T. Tao that takes an entirely different, “analytical” approach involving areas defined by line integrals and Stokes’ theorem.

Location: Seminar Room

Jun 14, 2017 | 10:00 AM

Polynomials and Polytopes

This is a workshop within the project on NonLinear Algebra that is funded for 2015-2018 by the Einstein Foundation . The workshop is also supported by the TU Berlin , the MPI for Mathematics in the Sciences in Leipzig, and the Emmy Noether Programm of the DFG .

Location: MA 144 Straße des 17. Juni 136 10623 Berlin

Jun 10, 2017

Conference on Convex, Discrete and Integral Geometry

Location: Banach Center, Będlewo, Polen

Jun 04, 2017 - Jun 09, 2017

Jörgshop TU Berlin, 2017

Location: TU Berlin MA041 (ground floor) of the Mathematics Building Strasse des 17 Juni 136

Jun 02, 2017 - Jun 03, 2017

Seminar on Non-Linear Algebra

Location: MPI für Mathematik in den Naturwissenschaften Leipzig, E1 05 (Leibniz-Saal)

May 30, 2017 | 11:00 AM

Euler-Lecture

Location: Auditorium Maximum im Haus 8 der Universität Potsdam Am Neuen Palais 14476 Potsdam

May 19, 2017 | 02:00 PM

Defense Tobias Friedl

Location: Seminar Room

May 19, 2017 | 10:00 AM
May 15, 2017 - May 19, 2017
May 12, 2017

Workshop „Discrete Geometry“

Location: Mathematisches Forschungsinstitut Oberwolfach

Apr 09, 2017 - Apr 15, 2017

MNU Bundeskongress Aachen

Günter M. Ziegler: “Panorama der Mathematik”

Location: Aachen

Apr 07, 2017
Jan 25, 2017

Salon Sophie Charlotte der BBAW

Location: Akademiegebäude am Gendarmenmarkt, Berlin

Jan 21, 2017

Workshop „Combinatorics“

Location: Mathematisches Forschungsinstitut Oberwolfach

Jan 01, 2017 - Jan 06, 2017

Heidelberg Laureate Forum 2016

Location: Heidelberg

Sep 18, 2016 - Sep 23, 2016
Jul 28, 2016
Jul 28, 2016
Jul 24, 2016 - Jul 31, 2016
Jul 24, 2016 - Jul 31, 2016

Mathematics of Jirí Matoušek

Location: Charles University, Prague

Jul 23, 2016 - Jul 28, 2016

Mathematics of Jirí Matoušek

Location: Charles University, Prague

Jul 23, 2016 - Jul 28, 2016
Jun 18, 2016 - Jun 22, 2016

John von Neumann Lecture 2016

Location: Universität Münster

Jun 16, 2016

John von Neumann Lecture 2016

Location: Universität Münster

Jun 16, 2016

DMV & GAMM Jahrestagung

Location: TU Braunschweig

Mar 07, 2016 - Mar 11, 2016
Feb 12, 2016 | 04:00 PM
Feb 12, 2016 | 04:00 PM
Feb 02, 2016
Feb 02, 2016

Borel Seminar

Location: Les Diablerets, Switzerland

Jan 24, 2016 - Jan 29, 2016
Dec 14, 2015
Dec 14, 2015
Dec 11, 2015 | 04:00 PM
Dec 11, 2015 | 04:00 PM

7. Thüringer Geometrietag

Location: Friedrich-Schiller-Universität, Jena

Dec 04, 2015 - Dec 05, 2015

Discrete Geometry Seminar - Moritz Schmitt

Location: Seminar Room, Arnimallee 2, FU Berlin

Oct 29, 2015 | 02:00 PM

Discrete Geometry Seminar - Michal Lason

Location: Seminar Room, Arnimallee 2, FU Berlin

Oct 22, 2015 | 02:00 PM

Discrete Geometry Seminar - Alexander Engström

Location: Seminar Room, Arnimallee 2, FU Berlin

Oct 15, 2015 | 02:00 PM

Geometry and Symmetry Conference

The conference will celebrate the 60th birthdays in 2015 of  Karoly Bezdek  (University of Calgary, Canada and University of Pannonia, Hungary) and  Egon Schulte  (Northeastern University, USA). The theme of the conference will be “Geometry and Symmetry”, with emphasis on recent progress on aspects of discrete geometry in which Egon and Karoly have made remarkable contributions. The program of the conference will consist of invited lectures and contributed talks.

Location: Veszprém, Hungary

Jun 29, 2015 - Jul 03, 2015

Tsukerman - Circumcenter of mass

Location: Seminar Room, Arnimallee 2, FU Berlin

Jun 18, 2015 | 02:15 PM

Lange Nacht der Wissenschaften

Location: Arnimallee 6, FU Berlin

Jun 13, 2015 | 05:00 PM
Jun 12, 2015 | 01:30 PM

Discrete Geometry Seminar- Samuel Fionrini

Location: Seminar Room, Arnimallee 2, FU Berlin

Jun 11, 2015 | 02:15 PM
May 21, 2015 | 02:15 PM

Distributed Processes on Scale-Free Networks -- Tobias Friedrich

Lecture - 14:15   Tobias Friedrich -  HPI, Universität Potsdam  Distributed Processes on Scale-Free Networks Abstract:   The node degrees of large real-world networks often follow a power-law distribution. Such scale-free networks can be social networks, internet topologies, the web graph, power grids, or many other networks from literally hundreds of domains. The talk will introduce three mathematical models of scale-free networks (preferential attachment graphs, Chung-Lu graphs, hyperbolic random graphs) and analyze some of their properties. We then study three distributed processes and algorithms on these network models (rumor spreading, load balancing, de-anonymization) and present several open problems. The talk assumes no prior knowledge about scale-free networks or distributed computing.  Colloquium - 16:00   Fidaa Abed -  Technische Universität Berlin  Optimal Coordination Mechanisms for Multi-Job Scheduling Games Abstract:   We consider the unrelated machine scheduling game in which players control subsets of jobs. Each player's objective is to minimize the weighted sum of completion time of her jobs, while the social cost is the sum of players' costs. The goal is to design simple processing policies in the machines with small coordination ratio, i.e., the implied equilibria are within a small factor of the optimal schedule. We work with a weaker equilibrium concept that includes that of Nash.  We first prove that if machines order jobs according to their processing time to weight ratio, a.k.a. Smith-rule, then the coordination ratio is at most 4, moreover this is best possible among nonpreemptive policies. Then we establish our main result. We design a preemptive policy,  externality , that extends Smith-rule by adding extra delays on the jobs accounting for the negative externality they impose on other players.. For this policy we prove that the coordination ratio is 1+ φ ≈ 2.618, and complement this result by proving that this ratio is best possible even if we allow for randomization or full information. Finally, we establish that this externality policy induces a potential game and that an ε-equilibrium can be found in polynomial time. An interesting consequence of our results is that an ε-local optima of $R|\,|\sum w_jC_j$ for the jump (a.k.a. move) neighborhood can be found in polynomial time and are within a factor of 2.618 of the optimal solution. The latter constitutes the first direct application of purely game-theoretic ideas to the analysis of a well studied local search heuristic. 

Location: @TU MA 041

May 11, 2015 | 02:15 PM
May 07, 2015 | 02:15 PM

Hodge theory and combinatorics - Adiprasito

Location: Seminar Room, Arnimallee 2, FU Berlin

Apr 28, 2015 | 02:15 PM
Apr 24, 2015 | 04:00 PM
Apr 23, 2015 | 02:15 PM
Apr 20, 2015 | 02:15 PM

ERC Workshop "SD-Models"

Location: FU Berlin

Mar 23, 2015 - Mar 26, 2015
Feb 16, 2015 - Feb 17, 2015

Flag Vector Spaces of Polytopes, Spheres and Eulerian Lattices

Location: Seminar Room, Arnimallee 2, FU Berlin

Feb 12, 2015 | 02:15 PM
Feb 06, 2015 | 01:00 PM
Feb 02, 2015 | 02:15 PM

Moduli of Tropical Plane Curves- Sarah Brodsky

Location: Seminar Room, Arnimallee 2, FU Berlin

Jan 29, 2015 | 02:15 PM

Topology-Seminar-Configuration Spaces of Graphs

Location: Seminar room in the Villa, Arnimallee 2, 14195 Berlin

Jan 28, 2015 | 05:00 PM
Jan 26, 2015 | 02:15 PM

Preisverleihung

Location: TU Berlin, Audimax, Straße des 17. Juni 135

Jan 23, 2015 | 02:00 PM c.t. - 04:00 PM

"What is ... the probabilistic method?"

Location: @BMS Loft in Urania

Jan 23, 2015 | 01:00 PM
Jan 22, 2015 | 02:15 PM

Improving bistellar simplification

Location: Seminar room in the Villa, Arnimallee 2, 14195 Berlin

Jan 21, 2015 | 05:00 PM
Jan 18, 2015 - Jan 31, 2015

Generalized Schur-Horn orbitopes and zonoids

Location: Seminar Room, Arnimallee 2, FU Berlin

Jan 15, 2015 | 02:15 PM

Eliminating Tverberg Points: An Analogue of the Whitney Trick

Location: Seminar room in the Villa, Arnimallee 2, 14195 Berlin

Jan 14, 2015 | 05:00 PM

Phirotopes & Almost-Fisher Families

Location: Freie Universität Berlin, Takustr, 9, 14195 Berlin, room: 005

Jan 12, 2015 | 02:15 PM

Salon des Einstein-Zentrums Mathematik (ECMath)

Location: Urania Berlin, BMS Lounge, An der Urania 17, 10787 BErlin

Jan 09, 2015 | 04:00 PM

Discrete Geometry Seminar- Victor M.Buchstaber

Location: Seminar Room, Arnimallee 2, FU Berlin

Jan 08, 2015 | 02:15 PM

The maximum likelihood degree and data discriminants of likelihood equations

Location: Seminar room in the Villa, Arnimallee 2, 14195 Berlin

Jan 07, 2015 | 05:00 PM

Geometrietag an der TU Dresden

Location: TU Dresden

Dec 04, 2014 - Dec 05, 2014

ICM 2014

Location: Seoul, Korea

Aug 13, 2014 - Aug 21, 2014

Dürer Lecture in New York

Vor 500 Jahren schuf Albrecht Dürer seine drei berühmten "Meisterstiche", darunter den Kupferstich "MELENCOLIA I". Dieses Jubiläum wurde am 17. Mai 2014 mit einer Konferenz "500 Years of Melancholia in Mathematics" in New York gefeiert. Aus diesem Anlass sprach Günter M. Ziegler, Professor für Diskrete Geometrie an der Freien Universität Berlin, über den Polyeder in der "MELENCOLIA I". Hier sehen Sie eine Voraufzeichnung seines Vortrags mit dem Titel "Three Giants, Five Stars, Some Mistakes: Leonardo, Dürer, Kepler, and their Polyhedra" (auf Englisch).

May 17, 2014 - Jun 30, 2014

Buchpräsentation in München

Location: Buchhandlung Rupprecht, Amalienstraße, München

Nov 25, 2013 | 08:00 PM - 10:00 PM
Nov 20, 2013 | 07:30 PM - 09:30 PM