Talk at the conference in honor of Peter Orlik.
Fields Institute, Toronto, CA, August 19.-23., 2008.
Title: On the combinatorics of minimal complexes for complexified arrangements. (slides)
Workshop Computational Algebraic Topology.
Mathematisches Forschungsinstitut Oberwolfach, Germany, June 29 - July 4, 2008.
Invited talk at the Spring Southeastern Meeting of the A. M. S.
Louisiana State University, Baton Rouge, LA. March 28-30, 2008.
Title: Discrete Morse theory for complexified arrangements. (slides)
Seminar Talk, University of California at Davis, Davis, CA. November 19, 2007.
Title: Hyperplane arrangements ‘cut to the bone’. (slides)
Seminar Talk, The Mathematical Sciences Research Institute, Berkeley, CA, USA.
Title: When Mr. Artin leaves. (slides)
Seminar Talk, San Francisco State University, San Francisco, CA. September 28, 2007.
Title: The K(π,1)-problem for arrangements of Hyperplanes. (slides)
Talk at the conference Formal Power Series and Algebraic Combinatorics (FPSAC) 2007.
Nankai University, Tjanjin, China, July 2-6, 2007.
Title: Nested set complexes of Dowling lattices and complexes of Dowling trees. (slides)
CIMPA Summer school on arrangements and local systems.
Galatasaray university, Istanbul, Turkey. June 11-22, 2007.
Talk at the conference Combinatorial and Computational Algebraic Topology,
a “Minisymposium” of the annual meeting of the German Mathematical Society.
Humboldt University, Berlin, Germany. March 26-30, 2007.
Talk at the 58th Séminaire lotharingien de combinatoire.
Domaine des Hautannes, Saint Germain au Mont d’Or, Lyon, France. March 19-21, 2007.
Title: Combinatorial remarks on a classical theorem of Deligne.
Talk at the workshop Recent developments in arrangements and configuration spaces.
Mathematical Sciences Research Institute, Berkeley, CA, USA. August 7-11, 2006.
Title: “A note on Deligne’s proof and the strong lattice property”. (video!)
Talk at the Institute for Operations Research.
ETH Zurich, Switzerland. March 2, 2006.
Title: “Bounding instability of motion planning algorithms - an application of algebraic topology.”
Talk at the mathematics department.
University of Pisa, Italy. February 21, 2006.
Title: “The K(π, 1)-problem for hyperplane arrangements.”
Talk at the Séminaire doctorants.
IRMA, University of Strasbourg, France. February 9, 2006.
Title: “Le problème du K(π, 1) pour les arrangements d’hyperplans”.
Talk at the Oberseminar Geometrie.
University of Stuttgart, Germany. January 11, 2006.
Title: “Das K(π, 1)-Problem für Arrangements von Hyperebenen”.
Euroconference Algebraic and geometric combinatorics.
Anogia, Crete, Greece. August 20-26, 2005.
Talk at the conference Arrangements of Hyperplanes - Algebra, Combinatorics, Geometry and Topology.
Centro Stefano Franscini, Ascona, Switzerland. May 15-20, 2005.
Title: “Subdivision of complexes of k-trees”.
Conference Trends in Topological Combinatorics.
KTH Stockholm, Sweden. February 14-16, 2005.
Visitor at the special semester on arrangement theory.
MSRI, Berkeley, CA, USA. August-September 2004.
Talk at Geometry, Topology, and Combinatorics,
a Satellite Conference of the 4th European Congress of Mathematics
KTH Stockholm, Sweden July 3-6, 2004.
Title: “Diagram models for the covers of the Salvetti complex”.
Talk at the workshop Arrangements and combinatorial stratifications.
Centro E. De Giorgi, Pisa, Italy March 22-24, 2004.
Title: “Diagram models for the covers of the Salvetti complex”.
Talk at the special session on Geometry and Combinatorics.
AMS National Meeting, Phoenix, AZ. January 07-10, 2004.
Title: “Diagram models for the covers of the Salvetti complex”.
Workshop on arrangement theory.
Northern Arizona University, Flagstaff AZ, USA. January 03-06, 2004.
Miniworkshop Combinatorial stratifications in algebra and topology.
Mathematisches Institut Oberwolfach, Oberwolfach, Germany. November 02-08, 2003.