Date/Time
Date(s) - 19/01/2024
11:00 am - 12:00 pm

Location: Zoom via https://mcmaster.zoom.us/j/99871779472 Meeting ID: 998 7177 9472

Speaker: Martina Neumann (University of Vienna)

Title: Transferability of Graph Neural Networks using Graphon and Sampling Theories

Abstract: Graph neural networks (GNNs) have become powerful tools for processing graph-based information in various domains. A desirable property of GNNs is transferability, where a trained network can swap in information from a different graph without retraining and retain its accuracy. A recent method of capturing transferability of GNNs is through the use of graphons, which are symmetric, measurable functions representing the limit of large dense graphs. In this talk, I will present an explicit two-layer graphon neural network (WNN) architecture for approximating bandlimited signals, and explain how a related GNN guarantees transferability between both deterministic weighted graphs and simple random graphs. The proposed WNN and GNN architectures overcome issues related to the curse of dimensionality and offer practical solutions for handling graph data of varying sizes.