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» On Approximation Lower Bounds for TSP with Bounded Metrics
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NETWORKS
2006
14 years 11 months ago
Lower bounds for the relative greedy algorithm for approximating Steiner trees
Abstract. The Steiner tree problem is to find a shortest subgraph that spans a given set of vertices in a graph. This problem is known to be NP-hard and it is well known that a pol...
Stefan Hougardy, Stefan Kirchner
FOCS
2008
IEEE
15 years 23 days ago
On the Approximability of Budgeted Allocations and Improved Lower Bounds for Submodular Welfare Maximization and GAP
In this paper we consider the following maximum budgeted allocation (MBA) problem: Given a set of m indivisible items and n agents; each agent i willing to pay bij on item j and w...
Deeparnab Chakrabarty, Gagan Goel
ICALP
2010
Springer
15 years 4 months ago
Cell Probe Lower Bounds and Approximations for Range Mode
The mode of a multiset of labels, is a label that occurs at least as often as any other label. The input to the range mode problem is an array A of size n. A range query [i, j] mus...
Mark Greve, Allan Grønlund Jørgensen...
CPM
2005
Springer
75views Combinatorics» more  CPM 2005»
15 years 5 months ago
Sharper Upper and Lower Bounds for an Approximation Scheme for Consensus-Pattern
Brona Brejová, Daniel G. Brown, Ian M. Harr...