TY - RPRT
A1 - Sperber, Heike
T1 - How to find Nash equilibria with extreme total latency in network congestion games?
N2 - We study the complexity of finding extreme pure Nash equilibria in symmetric network congestion games and analyse how it depends on the graph topology and the number of users. In our context best and worst equilibria are those with minimum respectively maximum total latency. We establish that both problems can be solved by a Greedy algorithm with a suitable tie breaking rule on parallel links. On series-parallel graphs finding a worst Nash equilibrium is NP-hard for two or more users while finding a best one is solvable in polynomial time for two users and NP-hard for three or more. Additionally we establish NP-hardness in the strong sense for the problem of finding a worst Nash equilibrium on a general acyclic graph.
T3 - Report in Wirtschaftsmathematik (WIMA Report) - 116
KW - Spieltheorie
KW - BerechnungskomplexitÃ¤t
KW - network congestion game
KW - total latency
KW - extreme equilibria
KW - complexity
Y1 - 2008
UR - https://kluedo.ub.uni-kl.de/frontdoor/index/index/docId/2034
UR - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:hbz:386-kluedo-15786
ER -