GALaC team at LRI, Paris-Sud
GALaC is a research group at LRI, Paris-Sud University. We are focused on graph theory, combinatorics and network distributed systems algorithmic.
A global presentation of research activities in GALaC was made in 2013 for the AERES evaluation: Slides AERES 2013 and projet.
Recent Posts
Algorithms for the Metric Dimension problem on directed graphs
summary: In graph theory, the Metric Dimension problem is the following: we are looking for a minimum-size set R of vertices, such that for any pair of vertices of the graph, there is a vertex from R whose two distances to the vertices of the pair are distinct. This problem ...
Algorithmes de partitionnement par comparaison de paires
On cherche à reconstruire une partition d'un ensemble donné en envoyant des paires d'éléments à un oracle qui nous indique s'ils appartiennent à la même partie de la partition. Nous cherchons les algorithmes qui retrouvent la partition en un minimum de questions à l'oracle. Ce problème ...
Complexity of positional games
summary: Positional games are two-player games played on a hypergraph. The players alternate selecting vertices of the hypergraph, and the winning conditions depend solely on the filling of the hyperedges. Tic-tac-toe is a famous example of a positional game, with the rows, columns, and diagonals forming the hyperedges and the ...
Language-theoretic methods in semigroup theory
Language-theoretic methods in combinatorial group theory go back to the fundamental work by Anisimov in the 1970s. Since then, the area has exploded, including such deep theorems as the Muller-Schupp theorem: a group has context-free word problem if and only if it is virtually free. In this talk, I will ...
The Domino Snake Problem
summary: Deep within the swamp of undecidability lies the elusive domino snake. This species, first discovered in the 1970s by Myers, was originally introduced as an a priori simpler problem than the now celebrated Domino Problem. In this talk we will take a tour through what is known about this ...
Translations: fr