## Tutte Colloquium - David Wagner

**Title:** Discrete diffusion on graphs and real hyperplane arrangements

Speaker: | David Wagner |

Affiliation: | University of Waterloo |

Zoom: | Please email Emma Watson |

To view the slides: | Click here |

**Abstract:**

In 2016, Duffy, Lidbetter, Messinger, and Nowakowski introduced the following variation of a chip-firing model on a graph. At time zero, there is an integer number of "chips" at each vertex. Time proceeds in discrete steps. At each step, each edge is examined (in parallel) -- one chip is moved from the greater end to the lesser end if the ends are not equal.