Selected communications of Alexander D. Rahm (international conferences in boldface)


Invited by 
1216 February 2018 
Invited talk at a workshop on Ktheory, A^{1} homotopy and quadratic forms organised by Marco Schlichting and Heng Xie at Mathematics Institute, University of Warwick, UK 
Marco Schlichting 
23 January 2018 
Invited talk at the Séminaire AlgèbreGéométrie of Laboratoire de Mathématiques de Versailles, France 
Dimitri Zvonkine 
89 December 2017 
Talk at the international conference on group and representation theory "Nikolaus conference 2017" of Lehrstuhl D für Mathematik at RWTH Aachen 
Frank Lübeck 
1923 June 2017 
Invited talk at the 8th Atelier PARI/GP at Laboratoire de mathématiques Blaise Pascal, ClermontFerrand, France. 
Bill Allombert 
216 June 2017 
Invited participation at the LMFDB workshop Classical, Hilbert and Bianchi Modular Forms, their Lfunctions and Galois representations at Mathematics Institute, University of Warwick, UK. 
John Cremona 
May 11th, 2017 
Seminar talk in the Mathematische Gesellschaft of the Mathematisches Institut der Universität Göttingen 
Claudia Schoemann 
April 11th, 2017 
Seminar talk at the Institut de Recherche Mathématique Avancée (IRMA) Strasbourg, on "Cohomology of arithmetic groups and the Quillen conjecture" 
HansWerner Henn, Gael Collinet 
30 Oct  5 Nov 2016 
Talk at the workshop Computations in the Cohomology of Arithmetic Groups at Mathematisches Forschungsinstitut Oberwolfach (MFO) 
Eva BayerFluckiger, Philippe ElbazVincent, Graham Ellis 
June 68, 2016 
Talk at the joint Conference of the Belgian, Royal Spanish and Luxembourg Mathematical Societies, in Logroño, La Rioja 
Gabor Wiese 
October 19, 2015 
Talk at Universitaet Giessen, Germany : Ruan's cohomological crepant resolution conjecture 
Ralf Köhl 
Sept. 28 to October 2, 2015 
Talk at the conference of the DFG priority project SPP 1489, Algorithmic & Experimental Methods in Algebra, Geometry and Number Theory, at Universitaet Osnabrueck, Germany 
Winfried Bruns 
Aug. 31 to Sept. 3, 2015 
Talk at the conference "Finiteness Conditions in Topology and Algebra", at Queen's University Belfast (UK) 
Thomas Hüttemann 
July 29th, 2015 
Seminar talk at IST Austria (Institute of Science and Technology), Software for hyperbolic geometry and applications to isometry groups 
Herbert Edelsbrunner 
July 15, 2015 
Seminar Gruppen, Geometrie, Dynamik of Universitaet Giessen 
Ralf Koehl 
June 15th to 20th, 2015 
Talk at the conference DyToComp 2015  Dynamics, Topology and Computations, Mathematical Research and Conference Center in Bedlewo, Poland, A software for computations on the Dynamics and Topology of the Bianchi groups 
Piotr Zgliczyński 
April 29th, 2015 
Algebra Seminar, University of Glasgow, From a question of Serre to the QuillenWendt conjecture 
Luigi Vergori 
April 2nd, 2015 
Seminar of the research group Arithmétique et Théorie de l'Information (ATI),Luminy, Méthodes cohomologiques pour les formes modulaires de Bianchi 
David Kohel 
March 20th, 2015 
Pure Mathematics Colloquium of the University of Southampton, Bredon homology calculation techniques 
Ruben SanchezGarcia 
January 12 to 16, 2015 
Atelier PARI/GP 2015, Université de Bordeaux, Bianchi groups computation with PARI 
Bill Allombert, Karim Belabas 
December 1 to 5, 2014 
7th de Brun Workshop on Homological Perturbation Theory, From Homological Perturbation Theory to the QuillenWendt conjecture 
Graham Ellis 
July 14 to 16, 2014 
Workshop on Bianchi and Siegel modular forms, Sheffield, Bianchi modular forms of varying discriminant, level and weight 
Tobias Berger 
July 10, 2014 
Seminar on Euler Systems/Arithmetic Geometry, U. DuisburgEssen, The image of the BorelSerre bordification in algebraic Ktheory 
Oliver Bräunling 
April 14, 2014 
Université de Neuchâtel, Un accès à l'homologie de Bredon 
Alain Valette 
Dec. 20, 2013 
Universitaet Giessen, Germany, Determination of torsion invariants of arithmetic groups 
Ralf Koehl 
July 19, 2013 
Seminar of the Institute of Physics and Mathematics at Universidad Austral de Chile (UACh), Valdivia, Group Actions and Orbit Spaces 
Rodrigo Vargas 
April 11, 2013 
Séminaire Algèbre et topologie, IRMA Strasbourg, Calculs efficaces au dessus de la dimension cohomologique virtuelle 
Christine Vespa 
December 20, 2012 
Séminaire du laboratoire LSIIT Strasbourg, Homologie calculatoire de groupes modulaires 
Pascal Schreck, Mohamed Tajine 
December 7, 2012 
6th de Brún Workshop « Linear Algebra and Matrix Theory: connections, appl. and computations », A new technique to extract invariants of matrix groups 
Niall Madden, Rachel Quinlan 
July 1 to 6, 2012 
Banff International Research Station for Mathematical Innovation and Discovery, Canada, talk at the workshop Torsion in the homology of arithmetic groups: geometry, arithmetic, and computation 
Paul Gunnells 
June 4, 2012 
Vrije Universiteit Amsterdam, The arithmetic of symmetric spaces 
Rob de Jeu 
February 2012 
University College Dublin, Torsion subcomplex reduction and conjugacy classes graphs 
Kevin Hutchinson 
Feb. 2012 
Univ. Freiburg, Reduktion von Torsionsunterkomplexen & Konjugiertenklassengraphen 
Matthias Wendt 
Nov.. 2011 
Technische Universität Darmstadt, Polyhedral models for arithmetic groups 
Michael Joswig 
November 2011 
Seminar on Representation Theory and Algebraic Geometry, W.I.S., Numbertheoretic formulae for the homological torsion of the Bianchi groups 
Dmitry Gourevitch 
October 2011 
Hebrew University of Jerusalem, Amitsur Algebra seminar, Stringy orbifolds 
Alex Lubotzky 
July 2011 
London Mathematical Society  EPSRC Durham Symposium Geometry and Arithmetic of Lattices, Durham (England), Implications of hyperbolic geometry to operator Ktheory of artihmetic groups 
Mikhail Belolipetsky 
March 2011 
GdT. Géométrie hyperbolique et surfaces de Riemann, Univ. Paris 7, Inst. Math. Jussieu, La torsion homologique de SL_2 d'anneaux d'entiers 
Nicolas Bergeron 
February 2011 
Séminaire Algèbre et topologie, IRMA Strasbourg, Modèles cellulaires pour des groupes arithmétiques 
HansWerner Henn 
February 2011 
Séminaire Théorie des Nombres de Bordeaux, La conjecture de Baum/Connes  un accès explicite 
Guilhem Castagnos 
December 2010 
Seminar on Representation Theory and Algebraic Geometry, W.I.S., (Co)homologies and Ktheory of Bianchi groups using comp... 
Stephen Gelbart 
November 2009 
National University of Ireland at Galway, The integral homology of PSL_2 of imaginary quadratic integers with nontrivial class group 
Graham Ellis 
November 2009 
Séminaire Algèbre et Géométries, Grenoble,Domaines fondamentaux pour groupes de matrices sur des entiers quadratiques imaginaires 
Alessandro Chiodo 
October 2009 
Conférence de l'Institut Fourier, Autrans, Homologie de groupes discrets d'isométries de l'espace hyperbolique 
Michel Brion 
September 2009 
17^{th} öMG Congress and Annual DMV Meeting, Graz, Austria, The integral homology of PSL_2 of imag. quad. int. of class number two 
Joachim Schwermer 
June 2009 
Alg., Géom. Alg., Top. Alg., I3M Montpellier, Homologie à coefficients entiers de PSL_2 sur des anneaux d'entiers quadratiques imaginaires 
Nicolas Ressayre 
June 2009 
Research Seminar Comp. Algebra & Number Theory, Düsseldorf, The integral homology of PSL_2 of imaginary quadratic integers 
Fritz Grunewald 
June 2009 
Louise Nyssen 

November 2008 
Autumn School about Geometric invariants of groups, Göttingen Homology of isometry groups of Hyperbolic Space 
Andreas Thom 
June 2007 
Summer School in Algebraic Topology, Univ. Lille, France Characteristic classes of complexified bundles 
Sadok Kallel 
September 2006 
Conference at the Banach Math. Center, Bedlewo, Poland, Characteristic classes of real generator bundles 
Thomas Schick 
2006 
Séminaire Gaston Darboux, I3M Montpellier, Variétés pseudoriemanniennes et réductions de fibrés principaux 
Philippe ElbazVincent 
2006 
Math. Institut, Universität Tübingen, The Lefschetz hyperplane intersection theorem 
Victor Batyrev 