06.11.2024, 14:00 - 16:00
– Campus Golm, Building 9, Room 2.22 and via Zoom
Institutskolloquium
Graphon Models for Inhomogeneous Random Graphs
Olga Klopp (Paris), Nicolas Verzelen (Montpellier)
Michael Schwarz (Potsdam)
We consider weighted graphs with an infinite set $X$ of vertices such that every function of finite energy is bounded. For each of these graphs there is a compact set $K$ containing $X$ as a dense subset and, thus, we can define some kind of boundary as $\partial X=K\setminus X$. Then we equip the graph with a finite measure and define two natural Dirichlet forms $Q^{(D)}$ and $Q^{(N)}$. We show that every Dirichlet form $Q$ that satisfies $Q^{(D)}\geq Q\geq Q^{(N)}$ can be decomposed into a part on the graph and a part on the boundary, which is a Dirichlet form (in the wide sense) with respect to a certain measure.