Person

Dr. rer. nat.

Sandra Kiefer

Sandra Kiefer Copyright: Copyright 2010
Lehrstuhl für Informatik 7 (Logik und Theorie diskreter Systeme)

Address

Building: E1, 1. Etage

Room: 4107a

Ahornstraße 55

52074 Aachen

Contact

WorkPhone
Phone: +49 241 80 21717
Fax Fax: +49 241 80 22215

Office Hours

by appointment
 

Research Interests

Algorithmic Graph Theory, Discrete Mathematics (in particular, Combinatorial Optimization, Geometric Group Theory), Topology

 

Recent Presentations

Ein Logikspiel auf bunten Graphen (German) — World Logic Day 2021 at University of Hamburg (virtual).

 

Publications

Title Authors Published in

The Weisfeiler-Leman Algorithm: An Exploration of its Power

Sandra Kiefer

ACM SIGLOG News
7(3), 2020
Power and Limits of the Weisfeiler-Leman Algorithm Sandra Kiefer

RWTH Aachen University Publications
2020
The Iteration Number of Colour Refinement Sandra Kiefer, Brendan D. McKay Proceedings of the 47th International Colloquium on Automata, Languages, and Programming, ICALP 2020, virtual, July 8-11, 2020
The Power of the Weisfeiler-Leman Algorithm to Decompose Graphs Sandra Kiefer, Daniel Neuen Proceedings of the 44th International Symposium on Mathematical Foundations of Computer Science, MFCS 2019, Aachen, Germany, August 26-30, 2019
String-to-String Interpretations with Polynomial-Size Output Mikołaj Bojańczyk, Sandra Kiefer, Nathan Lhote Proceedings of the 46th International Colloquium on Automata, Languages, and Programming, ICALP 2019, Patras, Greece, July 8-12, 2019
A Linear Upper Bound on the Weisfeiler-Leman Dimension of Graphs of Bounded Genus Martin Grohe, Sandra Kiefer Proceedings of the 46th International Colloquium on Automata, Languages, and Programming, ICALP 2019, Patras, Greece, July 8-12, 2019
The Weisfeiler-Leman Dimension of Planar Graphs is at most 3 Sandra Kiefer,
Ilia Ponomarenko,
Pascal Schweitzer

Journal of the ACM
66(6), 2019

Proceedings of the 32nd Annual ACM/IEEE Symposium on Logic in Computer Science, LICS 2017, Reykjavík, Iceland, June 20-23, 2017

Upper Bounds on the Quantifier Depth for Graph Differentiation in First Order Logic

Sandra Kiefer,
Pascal Schweitzer

Logical Methods in Computer Science
15(2), 2019

Proceedings of the 31st Annual ACM/IEEE Symposium on Logic in Computer Science, LICS 2016, New York, NY, USA, July 5-8, 2016

Graphs Identified by Logics with Counting

Sandra Kiefer,
Pascal Schweitzer,
Erkal Selman

Proceedings of the 40th International Symposium on Mathematical Foundations of Computer Science, MFCS 2015, Milan, Italy, August 24-28, 2015