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» A New Tight Upper Bound on the Transposition Distance
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STOC
2006
ACM
166views Algorithms» more  STOC 2006»
14 years 10 months ago
New upper and lower bounds for randomized and quantum local search
Local Search problem, which finds a local minimum of a black-box function on a given graph, is of both practical and theoretical importance to combinatorial optimization, complexi...
Shengyu Zhang
IWPEC
2009
Springer
14 years 4 months ago
A Probabilistic Approach to Problems Parameterized above or below Tight Bounds
We introduce a new approach for establishing fixed-parameter tractability of problems parameterized above tight lower bounds or below tight upper bounds. To illustrate the approac...
Gregory Gutin, Eun Jung Kim, Stefan Szeider, Ander...
CORR
2011
Springer
151views Education» more  CORR 2011»
13 years 4 months ago
Multiply-Recursive Upper Bounds with Higman's Lemma
We develop a new analysis for the length of controlled bad sequences in well-quasi-orderings based on Higman’s Lemma. This leads to tight multiply-recursive upper bounds that re...
Sylvain Schmitz, Philippe Schnoebelen
APPROX
2006
Springer
106views Algorithms» more  APPROX 2006»
14 years 1 months ago
A Tight Lower Bound for the Steiner Point Removal Problem on Trees
Gupta (SODA'01) considered the Steiner Point Removal (SPR) problem on trees. Given an edge-weighted tree T and a subset S of vertices called terminals in the tree, find an edg...
Hubert T.-H. Chan, Donglin Xia, Goran Konjevod, An...
IPPS
1999
IEEE
14 years 2 months ago
A Parallel Algorithm for Bound-Smoothing
Determining molecular structure from interatomic distances is an important and challenging problem. Given a molecule with n atoms, lower and upper bounds on interatomic distances ...
Kumar Rajan, Narsingh Deo