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APPROX
2008
Springer
83views Algorithms» more  APPROX 2008»
13 years 6 months ago
Near Optimal Dimensionality Reductions That Preserve Volumes
Avner Magen, Anastasios Zouzias
APPROX
2008
Springer
95views Algorithms» more  APPROX 2008»
13 years 6 months ago
Sweeping Points
Given a set of points in the plane, and a sweep-line as a tool, what is best way to move the points to a target point using a sequence of sweeps? In a sweep, the sweep-line is plac...
Adrian Dumitrescu, Minghui Jiang
APPROX
2008
Springer
100views Algorithms» more  APPROX 2008»
13 years 6 months ago
A Simple LP Relaxation for the Asymmetric Traveling Salesman Problem
A long-standing conjecture in Combinatorial Optimization is that the integrality gap of the Held-Karp LP relaxation for the Asymmetric Traveling Salesman Problem (ATSP) is a consta...
Thành Nguyen
APPROX
2008
Springer
135views Algorithms» more  APPROX 2008»
13 years 6 months ago
The Directed Minimum Latency Problem
We study the directed minimum latency problem: given an n-vertex asymmetric metric (V, d) with a root vertex r V , find a spanning path originating at r that minimizes the sum of...
Viswanath Nagarajan, R. Ravi
APPROX
2008
Springer
107views Algorithms» more  APPROX 2008»
13 years 6 months ago
A General Framework for Designing Approximation Schemes for Combinatorial Optimization Problems with Many Objectives Combined in
Abstract. In this paper, we propose a general framework for designing fully polynomial time approximation schemes for combinatorial optimization problems, in which more than one ob...
Shashi Mittal, Andreas S. Schulz
APPROX
2008
Springer
71views Algorithms» more  APPROX 2008»
13 years 6 months ago
Tight Bounds for Hashing Block Sources
It is known that if a 2-universal hash function H is applied to elements of a block source (X1, . . . , XT ), where each item Xi has enough min-entropy conditioned on the previous...
Kai-Min Chung, Salil P. Vadhan
APPROX
2008
Springer
88views Algorithms» more  APPROX 2008»
13 years 6 months ago
Limitations of Hardness vs. Randomness under Uniform Reductions
We consider (uniform) reductions from computing a function f to the task of distinguishing the output of some pseudorandom generator G from uniform. Impagliazzo and Wigderson [IW]...
Dan Gutfreund, Salil P. Vadhan
APPROX
2008
Springer
245views Algorithms» more  APPROX 2008»
13 years 6 months ago
Approximating Optimal Binary Decision Trees
Abstract. We give a (ln n + 1)-approximation for the decision tree (DT) problem. An instance of DT is a set of m binary tests T = (T1, . . . , Tm) and a set of n items X = (X1, . ....
Micah Adler, Brent Heeringa