Dear all,

this is a reminder for the next UnRAVeL survey lecture that takes place this Thursday, May 20 at 4:30pm. Martin Grohe will talk about The Logic of Graph Neural Networks. Following the talk, UnRAVeL PhD student Tim Seppelt will give an informal summary of their doctoral studies within UnRAVeL.

Abstract
Graph neural networks (GNNs) are a deep learning architecture for graph structured data that has developed into a method of choice for many graph learning problems in recent years. It is therefore important that we understand their power. One aspect of this is the expressiveness: which functions on graphs can be expressed by a GNN model? Surprisingly, this question has a precise answer in terms of logic and a combinatorial algorithm known as the Weisfeiler–Leman algorithm.

In my lecture, I will introduce the basic GNN architecture and also some extensions, and I will explain the logical characterisations of their expressiveness.

Further information can be found on https://www.unravel.rwth-aachen.de/go/id/mxjrr?lidx=1#aaaaaaaaaamxjvb and below.

The event takes place on Zoom:

https://rwth.zoom.us/j/96043715437?pwd=U0dRczkyQjRCY21abW13TDNmUHlhUT09
Meeting ID: 960 4371 5437
Passcode: 039217

Since the event is open also to master's students, who may not receive this email, we would kindly appreciate if you could pass this invitation on.

We are looking forward to seeing many of you at the survey lecture.

Best regards,
Tim Seppelt for the organisation committee


-------- Forwarded Message --------
Subject: UnRAVeL "Behind the Scenes" Survey Lecture
Date: Fri, 19 Mar 2021 10:43:09 +0100
From: Tim Seppelt <seppelt@cs.rwth-aachen.de>
To: assistenten@informatik.rwth-aachen.de, vortraege@informatik.rwth-aachen.de
CC: Andreas Klinger <klinger@itsec.rwth-aachen.de>, Birgit Willms <willms@informatik.rwth-aachen.de>, Dennis Fischer <fischer@algo.rwth-aachen.de>


Dear all,

part of the programme of the research training group UnRAVeL is a series of introductory lectures on the topics of „randomness“ and „uncertainty“ in UnRAVeL’s research thrusts algorithms and complexity, verification, logic and languages, and their application scenarios. Each lecture is delivered by one of the researchers involved in UnRAVeL. The main aim is to provide doctoral researchers as well as master students a broad overview of the subjects of UnRAVeL.

This year, 12 UnRAVeL professors will answer the following questions, based on one of their recent scientific results:

Following these talks, PhD students will give an informal summary of their doctoral studies within UnRAVeL.

All interested doctoral researchers and master students are invited to attend the UnRAVeL lecture series 2021 and engage in discussions with researchers and doctoral students.

Details information can be found on https://www.unravel.rwth-aachen.de/cms/UnRAVeL/Studium/~pzix/Ringvorlesung-Veranstaltung/?lidx=1

All events take place on Thursdays from 16:30 to 18:00 on Zoom https://rwth.zoom.us/j/96043715437?pwd=U0dRczkyQjRCY21abW13TDNmUHlhUT09

We are looking forward to seeing you at the lectures.

Best regards,
Tim Seppelt for the organisation committee

https://www.unravel.rwth-aachen.de/global/show_picture.asp?id=aaaaaaaaaydoczx