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» Approximating the Maximum Sharing Problem
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SODA
2008
ACM
184views Algorithms» more  SODA 2008»
13 years 9 months ago
Coresets, sparse greedy approximation, and the Frank-Wolfe algorithm
The problem of maximizing a concave function f(x) in a simplex S can be solved approximately by a simple greedy algorithm. For given k, the algorithm can find a point x(k) on a k-...
Kenneth L. Clarkson
SIAMSC
2008
193views more  SIAMSC 2008»
13 years 7 months ago
Exact and Approximate Sparse Solutions of Underdetermined Linear Equations
Abstract. In this paper, we empirically investigate the NP-hard problem of finding sparsest solutions to linear equation systems, i.e., solutions with as few nonzeros as possible. ...
Sadegh Jokar, Marc E. Pfetsch
TIP
2008
169views more  TIP 2008»
13 years 7 months ago
Maximum Likelihood Wavelet Density Estimation With Applications to Image and Shape Matching
Density estimation for observational data plays an integral role in a broad spectrum of applications, e.g. statistical data analysis and information-theoretic image registration. ...
Adrian M. Peter, Anand Rangarajan
CORR
2008
Springer
112views Education» more  CORR 2008»
13 years 7 months ago
Approximating Transitivity in Directed Networks
We consider the minimum equivalent digraph (directed network) problem (also known as the strong transitive reduction) and its maximum objective function variant, with two types of...
Piotr Berman, Bhaskar DasGupta, Marek Karpinski
WADS
2007
Springer
140views Algorithms» more  WADS 2007»
14 years 1 months ago
A Stab at Approximating Minimum Subadditive Join
Let (L, ∗) be a semilattice, and let c : L → [0, ∞) be monotone and increasing on L. We state the Minimum Join problem as: given size n sub-collection X of L and integer k w...
Staal A. Vinterbo