Friday, 16:15 - 16:40 h, Room: H 3010


Rene Sitters
Metrical service systems and the generalized work function algorithm


There are some very intriguing open problems in online optimization. Examples are the k-server conjecture (deterministic and randomized) and the dynamic search tree conjecture (dynamic optimality conjecture). Both problems are in the class of metrical service systems (online shortest path problems). It is widely believed that dynamic search trees are constant competitive. We show some strong techniques for proving constant competitiveness of metrical service systems and develop a universal theory of competitive analysis of metrical service systems. In particular, we apply this to the generalized 2-server problem and show that the generalized work function algorithm is onstant competitive in any metric space, as was conjectured by Koutsoupias and Taylor (2004).


Talk 3 of the invited session Fri.3.H 3010
"Routing and shortest paths" [...]
Cluster 1
"Approximation & online algorithms" [...]


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