From the event website:
Pebbling on Graphs: Demonic Graphs and Troop Deployment
"Many mathematicians enjoy thinking about mathematics without concerning themselve about what, if any, applications those ideas may have. As more people work with these ideas, variations of the original ideas are defined, and occasionally, those variations lead to “real-world applications.” In this talk, I will discuss some pebbling results by one of my undergraduate students, and then I will consider a variation of pebbling that was applied to troop deployment and used by other mathematicians in an attempt to explain the fall of the Roman Empire."
For more information, see the event website.