
MITACS Seminar Series on Mathematics of Computer Algebra and AnalysisHow to draw with a small number of crossings.Bojan Mohar, Simon Fraser University3:30pm, Wednesday March 4th, 2009, in K9509.
Abstract: The problem of drawing graphs with the number of crossings of edges minimized has many applications. In addition to its mathematical importance, this concept is relevant in the design of integrated circuits, for the aesthetics of data visualization, and has recently found beautiful applications in combinatorial geometry and in number theory. Although the problems about crossing numbers are easily understood, they lead to challenging and notoriously hard mathematical problems. The history of crossing number problems along with the main theoretical milestones will be presented. The talk will conclude with the presentation of some recent advances in this area. The exposition will mostly be accessible for general audience with little or no mathematical background. 