# Online talk: James Davies

##### Monday, November 9,3pm ET (8pm GMT, 9am Tue NZDT)James Davies, University of WaterlooGeometric intersection graphs with large girth and chromatic number
We prove that both the classes of intersection graphs of axis-aligned boxes in $\mathbb{R}^3$ and intersection graphs of straight line segments in $\mathbb{R}^3$ contain graphs with arbitrarily large girth and chromatic number.