May 9, 2019
Sandpile group of graphs and digraphs
Date: May 9, 2019 |
1:30 pm –
Speaker: Lilla Tóthmérész, Eötvös Loránd University, Budapest
Location: Big Seminar room Ground floor / Office Bldg West (I21.EG.101)
I will also talk about a very nice connection between sandpile groups of ribbon graphs and planarity: By Chan-Church-Grochow and Baker-Wang, certain actions of the sandpile group of a ribbon graph on the spanning trees are canonical if and only if the ribbon structure is planar. With Tams Klmn and Seunghun Lee we gave a canonical definition for this action in the planar case.