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
Resilient PDE solving approaches for exascale comp
Calcul à haute performance
Tuesday 29 May 2018 - 10h30
Salle : 465 - PCRI-N
Paul Mycek .............................................

Binary pattern of length greater than 14 are abeli
Combinatoire
Friday 25 May 2018 - 14h30
Salle : 445 - PCRI-N
Matthieu Rosenfeld .............................................

TBA
Algorithmique distribuée
Wednesday 02 May 2018 - 10h30
Salle : 465 - PCRI-N
Evangelos Bampas .............................................

Mariage stable auto-stabilisant et distribué
Théorie des graphes
Friday 13 April 2018 - 14h30
Salle : 445 - PCRI-N
Marie Laveau .............................................

Modélisation et implémentation du produit de matri
Calcul à haute performance
Wednesday 11 April 2018 - 10h30
Salle : 465 - PCRI-N
Thomas Lambert .............................................