University of Calgary

Discrete Geometry Seminar

Submitted by admin on Fri, 01/25/2008 - 11:06am.

Dense Packings of Nonspherical Bodies and New Tilings of Three-Dimensional Euclidean Space

Submitted by rmmoffat on Thu, 04/05/2012 - 1:58pm.
Apr 13 2012 - 1:00pm
Apr 13 2012 - 2:00pm
Sal_Bio2.jpg
Speaker: 

Prof. Salvatore Torquato

Department of Chemistry, Department of Physics, Princeton

Center for Theoretical Science, & Program in Applied and Computational Mathematics

Princeton University

Princeton, New Jersey, USA

http://cherrypit.princeton.edu

Location: 
MS 427

The first part of the talk will focus on dense packings of convex and concave solids (particles) in three-dimensional Euclidean space. 

On global and local rigidity of ball-polyhedra

Submitted by jlongwor on Tue, 03/20/2012 - 10:18am.
Mar 23 2012 - 1:00pm
Mar 23 2012 - 1:50pm
Speaker: 

Karoly Bezdek

Location: 
MS 427

he rigidity theorems of Cauchy (1813), Alexandrov (1950) and Stoker (1968) are classical results in the theory of convex polyhedra. The relevant conjecture of Stoker (1968) is a long-standing open problem. We study analogues of them for (standard as well as normal) ball-polyhedra.

Untangling planar geometric graphs

Submitted by jlongwor on Tue, 03/13/2012 - 1:32pm.
Mar 16 2012 - 1:00pm
Speaker: 

Csaba Toth

Location: 
MS 427

We study the following problem: For an integer n, what is the maximum number f(n) such that every planar geometric graph with n vertices can be untangled such that at least f(n) vertices remain fixed.

Arithmetic and physics in discrete algebraic geometry

Submitted by jlongwor on Tue, 03/06/2012 - 11:43am.
Mar 9 2012 - 1:00pm
Mar 9 2012 - 1:50pm
Speaker: 

Dr. T. Hausel, Royal Society University Research Fellow, University of Oxford, UK

Location: 
MS 427

This Friday the Combinatorics and Discrete Geometry Seminar will also be a Fejes-Toth Lecture, a lecture series in honor of the legacy of László Fejes Tóth. Please see the link  http://math.ucalgary.ca/ccdg/news-events/events/talks for more information and a list of previous speakers.

Applications of Graph Theory in Geoscience

Submitted by rmmoffat on Tue, 02/28/2012 - 9:48am.
Mar 2 2012 - 1:00pm
Mar 2 2012 - 2:00pm
Speaker: 

Kris Vasudevan

Location: 
MS427

An understanding of seismicity and fracture patterns is a fundamental problem in geoscience.