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APPROX
2010
Springer
13 years 10 months ago
2010
Springer
We present a simple factor 6 algorithm for approximating the optimal multiplicative distortion of embedding (unweighted) graph metrics into tree metrics (thus improving and simplif...
APPROX
2007
Springer
14 years 17 days ago
2007
Springer
We prove a lower bound for swapping the order of Arthur and Merlin in two-round MerlinArthur games using black-box techniques. Namely, we show that any AM-game requires time (t2 )...
APPROX
2007
Springer
14 years 17 days ago
2007
Springer
We study the Steiner Tree problem in the model of two-stage stochastic optimization with non-uniform inflation factors, and give a poly-logarithmic approximation factor for this pr...
APPROX
2007
Springer
14 years 2 months ago
2007
Springer
: In the distribution-free property testing model, the distance between functions is measured with respect to an arbitrary and unknown probability distribution D over the input dom...
APPROX
2007
Springer
14 years 2 months ago
2007
Springer
We consider situations in which a decision-maker with a fixed budget faces a sequence of options, each with a cost and a value, and must select a subset of them online so as to ma...