Français Anglais
Accueil Annuaire Plan du site
Accueil > Evenements > Séminaires
Séminaire d'équipe(s) GALaC
Degree-Constrained Graph Orientation: Maximum Satisfaction and Minimum Violation
Hirotaka Ono

13 February 2015, 14h30
Salle/Bat : 475/PCRI-N
Contact :

Activités de recherche : Théorie des graphes

Résumé :
A degree-constrained graph orientation of an undirected graph G is an
assignment of a direction to each edge in G such that the outdegree
of every vertex in the resulting directed graph satisfies a specified
lower and/or upper bound. Such graph orientations have been studied
for a long time and various characterizations of their existence are
known. In this paper, we consider four related optimization problems
introduced in [4]: For any fixed non-negative integer W, the problems
Max W -Light, Min W -Light, Max W -Heavy, and Min W -Heavy take as
input an undirected graph G and ask for an orientation of G that
maximizes or minimizes the number of vertices with outdegree at most
W or at least W. The problems’ computational complexities vary with
W. Here, we resolve several open questions related to their polynomial-
time approximability and present a number of positive and negative results.
This is a joint work with Yuichi Asahiro, Jesper Jansson, Eiji Miyano.

Pour en savoir plus :
Séminaires
Knowledge Graph Refinement based on Triplet BERT-N
Gestion de données du Web
Monday 29 November 2021 - 13h00
Salle : 455 - PCRI-N
Armita Khajeh Nassiri .............................................

A Hyper-graph Approach for Computing EL+-Ontology
Raisonnement automatique
Monday 15 November 2021 - 13h00
Salle : 445 - PCRI-N
Hui Yang .............................................

Semantic approaches to predict the presence of asb
Intégration de données et de connaissances
Monday 08 November 2021 - 13h00
Salle : 455 - PCRI-N
Thamer Mecharnia .............................................

Pierre Andrieu - Agrégation de classements pour le
Thursday 21 October 2021 - 00h00
Salle : 435 - PCRI-N
.............................................

A counting argument for graph colouring
Théorie des graphes
Friday 08 October 2021 - 11h00
Salle : 445 - PCRI-N
Francois Pirot .............................................